小學四上英語閱讀題答案六年級
小學四年級英語閱讀理解題及答案
以下是由我為大家提供的小學四年級的英語閱讀理解題以及參考答案，歡迎大家閱讀學習!
第一篇：Lucy and Lily’s Bedroom
This is Lucy and this is Lily. They are twins(雙胞胎).They are twelve. This is their bedroom. It’s a nice room. The two beds look the same. This bed is Lily’s and that one is Lucy’s .The twins have two desks and two chairs. Lucy’s chair is green and Lily’s blue. Lucy’s skirt(裙子) is on her bed. Lily’s coat is on the clothes line(曬衣繩). Their clock,books and pencil-boxes are on the desk. Their schoolbags are behind the chair. Their bedroom is very nice and tidy(整潔的`).
根據短文選擇正確答案
( )1.Lucy and Lily are _____.
A.brothers B.sisters C.friends D.boys
( )2.Lucy and her sister have _____ .
A.two chairs and one desk B. two desks and one chair
C.two chairs and two desks D. one desk and one chair
( )3.Lily’s chair is _____ and Lucy’s is _____ .
A.ren, black B.yellow, black C.blue, green D.red, yellow
( )4.Where’s Lucy’s skirt?
A.It’s on the clothes line. B.It’s on their desk.
C.It’s on her bed. C.It’s on her sister’s bed.
( )5.Which sentence(句子) is right?
A.Their classroom is very nice. B.Their two chairs don’t look the same.
C.Their clock,coats and pencil-boxes are on the desk.
D.Their schoolbags are under the chair.
第二篇：A Crow and a Fox
One day a crow (烏鴉) finds a piece of meat. She picks it up in her mouth and flies to a tall tree. She is just going to eat the meat when a fox sees her. He comes and stands under the tree and says, “How pretty you are! You must be the prettiest bird in the world.”
The crow is very pleased (高興的)by these words. Then the fox speaks again, “I can see your pretty face, but I have not heard your voice (聲音). Why don’t you sing a song?”
;
2. 小學六年級英語閱讀答案
小學六年級英語閱讀答案
閱讀理解能力的提高，在於平常不斷的練習。為了幫助大家，我分享了一些六年級英語閱讀理解題及答案，希望能幫到大家!
六年級英語閱讀理解題及答案【1】
One day, Mr Read and his son Robert were going out for a walk. He put on a pair of shoes together with a pair of different socks, one white and one yellow. As he came out of his house, his son noticed(注意) the colours of his father’s socks and said,“ you have put on two different socks, dad.”
When he heard this, he looked at his socks and found that his son was right. He was happy and said to himself,“ what a clever son I have got!” Then he said to his son to go back to the house to get another pair of socks for him.
When the son went back to the house, all he could find was one white sock and one yellow sock. Robert then took the socks to his father and said,“It’s no use changing! These socks at home are also different, one yellow and one white.”
根據短文內容判斷正誤。
( )1. One day Mr Read and his daughter were going out for a walk.
( )2. Mr Read put on a pair of shoes together with a pair of socks in the same colour.
( )3. Robert went back to the house to get another pair of shoes for him.
( )4. Robert couldn’t find the socks in the house.
( )5. The socks at home had the same colour.
答案
FFTFF
六年級英語閱讀理解題及答案【2】
Buying a ticket
Wang Bin is a football fan. There is a football match between Chinese team and American team. He wants to watch it. He comes to the box office(售票處) and gives the clerk 10 yuan. The clerk says,“please give me another 10 yuan. The price(價格) of a ticket is 20 yuan.”
“Why?” says Wang Bin, I just watch Chinese team. I don’t want to watch the other team at all. Do you want me to buy a ticket for them? No, no, no…”
根據短文內容選擇正確答案。
( )1. How does Wang Bin like football?
A. Little. B. A little. C. Very. D. Very much.
( )2. Can you guess the meaning of “clerk” in the passage?
A. 商人 B. 老闆 C. 買主 D. 售票員
( )3. Can Wang Bin buy a ticket with 10 yuan?
A. Yes, he can.
B. Yes, he does.
C. No, he can’t.
D. No, he doesn’t.
( )4.“ Do you want me to buy a ticket for them?” The word “them” refers to
A. Chinese team
B. British team
C. American team
D. French team
( )5. Can Wang Bin watch the match?
A. Yes, he will.
B. Yes, he can.
C. No, he can’t.
D. No, he won’t
答案
DDDCC
六年級英語閱讀理解題及答案【3】
Last week I went to the cinema. I had a good seat. The film was very interesting. But I didn’t enjoy it. A young man and a young woman were sitting behind me. They were talking loudly. I got very angry. I could not hear the film. I turned round. I looked at them angrily. But they didn’t see me. At last I could not hear it. I said to them.
“I couldn’t hear a word!”
“It’s none of your business(沒你的事),”the young man said rudely,“this is a private conversation(私人談話).”
判斷正誤。
( )1. Last Sunday I went to the cinema.
( )2. A young man and a young woman were sitting in front of me.
( )3. The film was very bad, so I didn’t enjoy it.
( )4. They weren’t watching the film.
( )5. The young man thought the author(作者) would like to listen to their private conversation.
( )6. From this story we can see that the two young people were polite.
答案
FFFFTF
;3. 小學四年級英語閱讀理解題
小學四年級英語閱讀理解題
以下是由我給大家提供的小學四年級的英語閱讀理解題以及答案，大家一起來看一下吧!
第一篇：
One day a sheep is drinking water near a river. A wolf sees the sheep and wants to eat it very much. He says to the sheep, “You make my water dirty. I can’t drink it now.” The sheep says, “I am far away from you. How can I make your water dirty?” The wolf has nothing to say.
Then the wolf has another idea. He says to the sheep, “Last year you said something bad behind me.” They sheep cries, “No, I didn’t. I wasn’t born at that time.”
“Then it must be your daddy,” the wolf says. Then it rushes towards the sheep and eats it.
根據短文內容填空
1. A sheep is __________ water near a river.
2. A wolf wants to ________ the sheep.
3. Last year you ________ something bad behind me.
4. The wolf rushes _______ the sheep and eats it.
5. The sheep is far away _______ the wolf.
第二篇：
It’s Children’s Day today. Every student is happy. They bring their toys to the classroom and have a toy show.
There is a small toy car on the desk. It can run very fast. It’s Peter’s favorite toy. Lily has a lovely doll. It is on the chair. The doll has golden hair and blue eyes. It wears a dress. Look at the plane on the shelf. Mike says it can fly. There is a man in it. And there is a boat on the desk. It is not big, but it’s new. Zhou Jie likes it very much.
There are so many toys. They are all beautiful. The students play with the toys happily.
根據短文內容選擇正確答案
( )1. What day is today? Today is ______.
A. Children’s Day B. Teachers’ Day C. Spring Festival
( )2. What color are the doll’s eyes? They are ______
A. brown B. black C. blue
( )3. Where is the plane? It’s _______
A. on the desk B. on the chair C. on the shelf
( )4. What’s Zhou Jie’s favorite toy? It’s a ______.
A. plane B. boat C. car
( )5. Is the boat new?
A. No, it isn’t. B. Yes, it is. C. Yes, it does
第三篇：
Mary, Nancy, Ron and Kate are good friends. Mary’s favourite number is 3 and her favourite country is France. 16 is Nancy’s number, and America is her favorite country. Ron likes Japan very much. 30 is his favourite number. Whose favourite number is 60? Oh, it is Kate. Kate’s father works in a restaurant. He likes Chinese food very much and they also like Chinese people. Kate’s lucky number is 6. All of them hope that one day they can travel the world together.
根據短文內容判斷正(T)誤(F)
( )1. Mary’s favorite number is 13.
( )2. Nancy’s favorite country is America.
( )3. Ron likes Fance.
( )4. Kate’s father is a teacher.
( )5. Kate likes Chinese food.
>>>>>>參考答案<<<<<<
第一篇：1.drinking 2.eat 3.said 4.towards 5.from
第二篇：1.A 2.C 3.C 4.B 5.B
第三篇：1.F 2.T 3.F 4.F 5.T
;4. 小學英語閱讀理解答案
小學英語閱讀理解答案
下面是我為大家准備的小學英語的閱讀理解練習以及答案，大家一起來看一下吧!
第一篇：A Crow and a Fox
One day a crow (烏鴉) finds a piece of meat. She picks it up in her mouth and flies to a tall tree. She is just going to eat the meat when a fox sees her. He comes and stands under the tree and says, “How pretty you are! You must be the prettiest bird in the world.”
The crow is very pleased (高興的.)by these words. Then the fox speaks again, “I can see your pretty face, but I have not heard your voice (聲音). Why don’t you sing a song?”
This makes the crow very happy. She opens her mouth and begins to sing. As she opens her mouth, she drops(丟掉) the meat. The fox picks up (撿起) the meat at once and goes away with it.
仔細閱讀，根據短文內容，判斷下列句子的正誤，正確的寫“T”，錯誤的寫“F”
( )1. One day a crow finds a piece of meat.
( )2. Before the crow eats the meat, she meets a fox.
( )3. The fox asks the crow to dance.
( )4. The crow is very clever.
( )5. She is happy and flies to a tall house.
第二篇：How lucky the man is!
It is in summer. A young man comes to a forest (森林). He’s walking along the edge (邊緣) of the forest. On his right is a river. On his left is a forest. Suddenly he sees two green eyes looking at him from the trees. A wolf is getting ready to jump on him.
What does he do? He must jump into the river. In the river there is a crocodile (鱷魚). Its mouth is very big. The young man closes his eyes. And he hears the wolf jumps, but nothing happens to him. Then he opens his eyes and finds the wolf is now in the mouth of the crocodile.
根據短文內容判斷正(T)誤(F)
( )1. There is a river on the right of the young man.
( )2. A young woman comes to a forest.
( )3. There is a wolf on the right of the young man.
( )4. The crocodile jumps on the young man .
( )5. The crocodile eats the wolf.
第三篇：My School
I am a student of Houzhai Middle School. My school is new. It is big and beautiful. There are three grades. Every grade has twelve classes.
There are about one hundred teachers in our school. The people of my school are very friendly. We all work hard. In our school, there are many new buildings. Our classroom is big and bright, and there is a TV, we can learn much. There is a small hill behind our teaching building. We often visit it. There are many tall trees and beautiful flowers. Some birds often sing in the morning. There is a small lake too, the water is very clear. Do you think my school is beautiful? Welcome to my school!
New Words: clear 清澈的
正確的填T，錯誤的填F
( ) 1. My school is old and big.
( ) 2. I am a primary school pupil.
( ) 3. The students are very friendly.
( ) 4. The students are all lazy.
( ) 5. There are many trees, flowers in the school.
( ) 6. The water of the lake is dark.
( ) 7. I like my school.
第四篇：Trains
There are all kinds of trains in the world. There are trains to carry people, trains to carry animals and trains to carry things.
There are fast trains and slow trains. Some trains go under the ground and some trains go through hills.
In big cities, the streets are usually very busy. So you can find trains under the ground and trains on a rail above the streets. They carry people in and out of the city.
Can a train run over water? Yes, it can. There are many bridges over the river. The trains can easily run over the water. But it is not easy to build bridges.
Today's trains have dining rooms for people. You may eat something on the way if you are hungry.
Trains are useful to men, women and children. Many children have model trains. With the modle trains they can build their own rails enjoy the wonderful world of trains.
( )1.There are _____kinds of trains in the world.
A. a few
B. many
C. some
D. little
( )2.Usually people like taking_____.
A. fast trains
B. slow trains
C. trains to carry people
D. trains to carry animals
( )3.In_____cities,the streets are usually busy.
A. small
B. middle
C. large
D. tiny
( )4.The underground trains carry people_____.
A .in and out of big cities
B. from big cities to small towns
C. from small towns to big cities
D .in and out of countries
( )5.Many children can enjoy the wonderful world of trains because they_____.
A. have real trains
B. have model trains
C. often take trains
D .have real rails
第五篇：不同
One day, Mr Read and his son Robert were going out for a walk. He put on a pair of shoes together with a pair of different socks, one white and one yellow. As he came out of his house, his son noticed(注意) the colours of his father’s socks and said,“ you have put on two different socks, dad.”
When he heard this, he looked at his socks and found that his son was right. He was happy and said to himself,“ what a clever son I have got!” Then he said to his son to go back to the house to get another pair of socks for him.
When the son went back to the house, all he could find was one white sock and one yellow sock. Robert then took the socks to his father and said,“It’s no use changing! These socks at home are also different, one yellow and one white.”
根據短文內容判斷正誤。
( )1. One day Mr Read and his daughter were going out for a walk.
( )2. Mr Read put on a pair of shoes together with a pair of socks in the same colour.
( )3. Robert went back to the house to get another pair of shoes for him.
( )4. Robert couldn’t find the socks in the house.
第六篇：Lisa’s birthday is on October 18th
. It’s on Wednesday. She is going to have a birthday party. She wants to invite Peter, Gao Wei and Li Yan to her birthday party. They can celebrate after school. Today Lisa’s parents go shopping with Lisa. They want to buy a birthday cake and some other things for her birthday party.
M: What kind of cake would you like?
L: I’d like a fruit cake, please.
D: What shape would you like? A round one or a star one?
L: I’d like the star cake. How nice!
M: Yes, it looks lovely. L: Let’s get some ice cream, too.
D: Yes, and I’ll get some jelly for you.
L: Thank you. I love jelly. Can we get some round balloons and long balloons, too?
D: Certainly.
L: Thank you. I’ll have a great birthday party.
根據短文內容回答問題。
1.When is Lisa’s birthday?
2.Is her birthday on Thursday?
3.Does Lisa invite Kate to her birthday party?
4.What kind of cake would Lisa like?
5.Does she want a round cake?
( )5. The socks at home had the same colour.
>>>>>>參考答案<<<<<<
第一篇：1.T 2.T 3.F 4.F 5.F
第二篇：1.T 2.F 3.F 4.F 5.T
第三篇：1-7 F F T F T F T
第四篇：1-5 B C C A B
第五篇：F F T F F
第六篇：
1.Lisa’s birthday is on October 18th.
2.No, it isn’t.
3.No,she doesn’t.
4.The star cake.
5.No,she doesn’t.
;5. 小學英語閱讀理解六年級
小學英語閱讀理解六年級
以下是我提供給大家閱讀參考的小學六年級的英語閱讀理解練習題以及參考答案，有興趣的'朋友可以看一下哦!
第一篇：水的重要性
Water is very important to people. We must drink water every day. We can’t live without water. Water is everywhere around us. At home, we use water to wash clothes, to wash dishes, to cook meals, to clean the flat, to have showers, to make drinks, to clean our teeth, to have a bath and so on.
At work, people use water to put out fires, to grow vegetables, to make things in factories and so on. We also can swim on the earth. Water is important to us, isn’t it?
However, there isn’t much water on the earth. It is very valuable. We must save it. If we waste too much water, one day in the future, the last drop of water on the planet will be our tear.
根據短文內容回答問題。
1.What could we do with water at home?
2.Can we live without water?
3.Is there much water on our planet?
4. Why must we save water?
第二篇：Buying a ticket
Wang Bin is a football fan. There is a football match between Chinese team and American team. He wants to watch it. He comes to the box office(售票處) and gives the clerk 10 yuan. The clerk says,“please give me another 10 yuan. The price(價格) of a ticket is 20 yuan.”
“Why?” says Wang Bin, I just watch Chinese team. I don’t want to watch the other team at all. Do you want me to buy a ticket for them? No, no, no…”
根據短文內容選擇正確答案。
( )1. How does Wang Bin like football?
A. Little. B. A little. C. Very. D. Very much.
( )2. Can you guess the meaning of “clerk” in the passage?
A. 商人 B. 老闆 C. 買主 D. 售票員
( )3. Can Wang Bin buy a ticket with 10 yuan?
A. Yes, he can.
B. Yes, he does.
C. No, he can’t.
D. No, he doesn’t.
( )4.“ Do you want me to buy a ticket for them?” The word “them” refers to
A. Chinese team
B. British team
C. American team
D. French team
( )5. Can Wang Bin watch the match?
A. Yes, he will.
B. Yes, he can.
C. No, he can’t.
D. No, he won’t
第三篇：除夕夜
At midnight on New Year's Eve, my parents and I were in the flower fair. There were some roses, lilies, tulips, peach flowers, bluebells and some different kinds of plants. The flowers were beautiful. And there were some different kinds of toys. We bought a toy Micky Mouse. It's lovely and cute. And we bought some peach flowers. Because the flower fair is big, so we felt tired.
The first day of Sprig Festival. My mother and I made some mplings. In the evening we ate some mplings and noodles. Because the noodles bring long life. During Spring Festival, I had some lucky money. There were about 1000 yuan. I felt very happy!
( ) 1. My parents and I were in the flower show at midnight on New Year's Eve .
( ) 2. We bought a lovely and cute toy.
( ) 3. We were happy and we didn’t feel tired.
( ) 4. In the evening we ate some mplings and cakes.
( ) 5. I was very happy at Spring Festival.
第四篇：麥當勞植樹日
Today was Macdonalds’ Tree Planting Day. I went to the park with my parents. At about ten o’clock the manager of Macdonalds’ made a speech. Then we started to plant trees. We needn’t to dig holes because the people in the park g them before. We just put the young trees into the holes. My father filled the holes with me. My mother carried water for the young trees. We were so tired when we finished the work. All of us hope the trees will grow well. I hope I can plant trees next year.
( ) 1. Today was Macdonalds’ Tree Planting Day.
( ) 2. At about nine o’clock the manager of Macdonalds’ made a speech.
( ) 3. First we g holes.
( ) 4. My mother filled the holes with me. My father carried water for the young trees.
( ) 5. All of us were very tired and happy.
>>>>>>參考答案<<<<<<
第一篇：
1.We use water to wash clothes, to wash dishes,to cook meals, to clean the flat,to have showers, to make drinks,to clean our teeth, to have a bath and so on.
2.No,we can not.
3.No,there isn’t.
4.Because there isn’t much water on the earth. It is very valuable. We must save it. If we waste too much water, one day in the future, the last drop of water on the planet will be our tear.
第二篇：D D D C C
第三篇：1-5 F T F F T
第四篇：1-5 T F F F T
;6. 小學四年級英語閱讀理解
小學四年級英語閱讀理解
小學四年級的英語閱讀理解的練習題都有哪些呢?下面我跟大家分享小學四年級的英語閱讀理解練習題以及參考答案，希望大家喜歡!
第一篇：Class One,Grade Four
It is Tuesday today.Boys and girls are all at school。They usually come to school by bus.
Their teacher is at school.too.The teacher’s name is Gu Yan.She is young.She usually comes to school on foot.
Look at the classroom of Class One,Grade Four.In this room,you can see a boy and a girl.The boy is eleven.His name is Jack.The girl is Emma.She is twelve.John is Jack’s friend.He is an American boy.
根據短文內容判斷正誤
( )1.Boys and girls are all at home today.
( )2.The boys and girls go to school by bus.
( )3.Miss Gu is not old.
( )4.Miss Gu usually goes to school by bike.
第二篇：James Is Ill
James is a primary school(小學) student.He’s in Grade(年級) Three now.He has a round face and wears glasses.He likes playing football and swimming.But today he doesn’t go to school.He’s ill.He’s in bed.He had a bad cold.He must stay in bed for a week.
根據短文選擇正確的'答案
( )1.James is a _____ student.
A.primary school B.middle school C.senior school
( )2.Jame is in Grade _____.
A.Too B.Three C.Two
( )3.Jame likes _____.
A.basketball B.football C.table tennis
( )4.James is in bed because _____.
A.he is tired B.he is ill C.he is sleepy
( )5.James must stay in bed for _____.
A.a day B.a week C.two weeks
第三篇：Our Class
This is our class. There are fifty students in our class. There are twenty-five boys and twenty-five girls. There is an American student in our class. Her name is Mary. Her English is very good. We all like her. She likes eating bread and cakes. She likes drinking milk and orange juice. We like eating rice and drinking tea. We are very happy together.
I. 仔細閱讀，在下列句子前標上T(對)或F(錯)
( )1. There is an American boy in our class.
( )2. Mary is an English girl.
( )3. She likes rice, tea, and bread.
( )4. We are good friends.
( )5. There are twenty-four girls in our class.
II. 在A, B, C中選出一個最佳答案
( )1. How many students are there in the class?
A. Twenty-five B. Fifty-five C. Fifty
( )2. What does Mary like eating?
A.hamburger B.hot dog C.Cakes and bread
( )3. What does she like drinking?
A. Apple juice. B. Cola C. Orange juice and milk
( )4. What do the Chinese students like eating and drinking?
A. Rice and tea B. Bread and milk C. Bread
第四篇：Betty and Kitty
Betty and Kitty are twins. They’re 12 years old. They look the same. But they have different (不同的)hobbies. Betty likes collecting stamps(集郵). She has many beautiful stamps. They’re from different cities(城市)and countries(國家). But Kitty likes growing flowers. The flowers are all very beautiful.Betty and Kitty both like reading books. Betty likes reading storybooks. But Kitty likes reading science books.On Sunday,they usually ride bikes to the park. They can play with their friends there. Sometimes their parents go there, too.
根據短文內容，判斷下列句子的正誤，正確的寫“T”，錯誤的寫“F”
( ) 1. Betty is Kitty’s sister.
( ) 2. Betty likes growing flowers.
( ) 3. Kitty likes reading storybooks.
( ) 4. They’re twelve years old.
( ) 5. They usually take a bus to the park on Saturday.
>>>>>>參考答案<<<<<<
第一篇：1.F 2.T 3.T 4.F
第二篇：1.A 2.B 3.B 4.B 5.B
第三篇：
I. 仔細閱讀，在下列句子前標上T(對)或F(錯)
1.F 2.F 3.F 4.T 5.F
II. 在A, B, C中選出一個最佳答案
1.C 2.C 3.C 4.A
第四篇：1.T 2.F 3.F 4.T 5.F
;7. 小學六年級英語閱讀理解題及答案
小學六年級英語閱讀理解題及答案
以下是我為大家准備的`小學六年級的英語閱讀理解題以及參考答案，大家一起來看一下吧!
第一篇：
There are forty-two students in our class . There are also two American boys . They are Jack and Mike . They are our good friends . They like watching TV ,but they don’t like playing basket-ball .They often go to school by bike . And I often go to school on foot . There is one English girl in our class . Her name is Lucy . She likes playing basketball and she also likes swimming . She usually does her homework in the evening . She often watches TV on Saturday afternoons . She is my good friend . All of the Chinese students are Yong Pioneers .
根據短文內容，判斷正(T)誤(F)。
( ) 1. There are thirty-nine Chinese students in our class .
( ) 2. There are two American girls and one English boy in our class .
( ) 3. Jack and Mike are our good friends .
( ) 4. Jack and Mike like playing basketball .
( ) 5. Lucy often does her homework on Saturday afternoons .
第二篇：
Jill and Kate are going hiking (徒步旅行) with their class tomorrow . They went to take some fruits with them . Jill likes oranges and Kate likes apples . When they get to the market , they can’t find any oranges , and the apples are too green . “What are we going to buy now ?” asks Kate “Hey ,what’s that big round fruit over there ?” asks Jill .”I don’t know .Let’s ask the sales-girl .” “What do you call this ? ” “Youzi ,”answers the girl . “Why don’t we buy one ?”asks Jill “OK. We ’re going to have lots of fun hiking and eating a new kind of fruit ! ”says Kate .
根據短文內容，判斷正(T)誤(F)。
( ) 1. Kate is going hiking this afternoon .
( ) 2. Jill like apples and Kate like oranges .
( ) 3. They don’t buy apples because the apples are too green .
( ) 4. Youzi is a big round fruit .
( ) 5. They’re going to eat a new kind of fruit tomorrow .
第三篇：
There are four people in the twins’ family .They are the twins , their father and their mother . The twins’ names are Lucy and Lily . They are fourteen . They are in the same class in the NO.1 Middle School . They are very good students . They not only work very hard but also sing very well . They want to join the music club . Lucy wants to play the piano . Lily can play the guitar .
Their father , Mr King , is a teacher . He teaches English in a school near his home . Their mother , Mrs King ,is a teacher ,too .She teaches Chinese . Mr and Mrs King are in different schools . But they have the same hobby—play the guitar .
根據短文內容，選擇正確答案。
1. Mr King is a good _______ .
A. driver B. worker C. teacher D. farmer
2. Lily can __________ .
A. play the piano
B. draw horses
C. play the guitar
D. play chess
3. Mrs King is a ___________ .
A. math teacher
B. Chinese teacher
C. English teacher
D. doctor
4. Their parents work __________ .
A. in the same school
B. in a different school
C. English teacher
D. in different school
5. The twins are in the _______ Middle School .
A. No.5 B. No.1 C. No.4 D. No.2
>>>>>>參考答案<<<<<<
第一篇：TFTFF
第二篇：FFTTT
第三篇：CCBDB
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