DNA is the whole "map" of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.
People have been trying to understand the human body for a long time. In I860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called "genes"(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages. They’re written in the DNA with a special language.
In 1961, another two scientists found the first "word" that they could understand in that language. It shows how DNA tells the cell (细胞)to build its parts, the words in the DNA map, but we still do not understand what they all do. By understanding what just one "word" means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.
Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more "words" and find out more information, we will use it in the wrong way, just to make people more attractive, or stop sick people getting jobs. The two scientists found ______in 1961.
| A．all the words in the DNA map |
| B．small things called "genes" in our body |
| C．the first "word" they could understand in that language |
| D．those small parts arc written in the DNA with a special language |
How can we help sick people if we understand more "words" in the DNA map?
| A．Make better medicine. |
| B．Make them get jobs. |
| C．Make maps for them. |
| D．Make them attractive. |
Which one is NOT TRUE according to the article?
| A．We look like our parents because of "genes" in our body. |
| B．We have understood what all the words in the DNA map do. |
| C．DNA is the whole "map" of the human body. |
| D．DNA tells the cell to build its parts. |
What do people think about this research about DNA?
| A．It can be only bad. |
| B．It can be only good. |
| C．It can be good but won't work. |
| D．It can be good and bad |
There are forty-eight students in our class. There are twenty-three boys and twenty-five girls. Some students live near the school, and some others live very far from the school. About half of the students come to school by bike . They often get to school at a quarter to seven. About ten students often come to school by bus. They often go to school very early, too. Another ten students come to school on foot. Their homes are near the school, but they are often late for school, because they get up very late.More than half of the students usually come to school ____.
| A．very late | B．very early |
| C．by bus | D．on foot |
Some students are often late for school because____.
| A．their homes are far from the school |
| B．they go to school on foot |
| C．they get up very late |
| D．they don't like going to school |
About ____ students go to school by bike.
| A．forty-eight | B．ten |
| C．twenty | D．twenty-four |
About ten students often come to school by bus because____.
| A．their homes are not near the school |
| B．they don't have any bikes |
| C．they can't ride bike |
| D．they want to go to school very early |
How many students live far from the school?
| A．About thirty-eight | B．About twenty |
| C．About ten. | D．About twenty-five |
Mr Smith gave his wife money every Friday evening. His wife always spent it all the next Wednesday, so that for the next three days she had no money to spend at all. One day Mr Smith asked her," But how did you spend all that money?" She answered, "I don't know . "So one Friday evening, Mr Smith gave her money together with an exercise book and a pencil. He said to his wife ,"Please write down how you spend the money . "Next Tuesday, his wife had no money again. Mr Smith took the exercise book to see how she had spent it. "I have done what you told me ,"she said gladly. She had written "Friday, I got 18 pounds from Mr Smith. "on the first page, and on the second page, she wrote ,"Tuesday, I have spent it all. "Mrs Smith always spent all the money ____.
| A．the next day | B．in four days |
| C．in a week | D．on next Wednesday |
Mr Smith gave his wife an exercise book and a pencil and asked her____
| A．to do homework |
| B．to have a look |
| C．to write down how she spent the money |
| D．to draw a picture on it |
Mrs Smith was ____ to do what Mr Smith asked her to .
| A．happy | B．sad |
| C．sorry | D．excited |
Mr Smith gave his wife money ____ a week.
| A．once | B．twice |
| C．three times | D．four times |
The story tells us that Mrs Smith was not very ____.
| A．glad | B．tall |
| C．careful | D．good |
Look at this photo. The boy’s name is John. He has two sisters. The one in the white dress is his sister, Rose. The other (另外的) one in the yellow dress is his sister, Mary. Rose and Mary have the same age(年龄). They look the same. They are twins. John and his sisters are in different schools. They have good friends in the school. Their dad and mom are English teachers. They both like their students. The family (家庭) is nice.Is John Rose and Mary’s brother?
__________________________________Are Rose and Mary look different?
__________________________________What do their dad and mom do?
__________________________________How many people (多少人) are there in John’s family?
__________________________________What color is Mary’s dress?
Jack is an English boy. He is a good student. He is twelve years old. Now he is in a red coat. Linda is Jack’s sister. She is a good girl. She is fourteen years old. Now she is in a green dress. Lucy and Lily are from the USA. They are students, too. They are in red coats. They look the same. Jack, Linda, Lucy and Lily are good friends. Jack, Lucy and Lily are in the same school. Linda is in a different school. They like China. Jack is from _____.
A. the USA B. England C. ChinaLinda is _____.
A. Lucy’s sister
B. Lily’s sister
C. Jack’s sister Linda is in _____.
A. a red dress
B. a red coat
C. a green dressLucy and Lily are _____.
A. in the same school
B. in the same class
C. in different schools Jack, Linda, Lucy and Lily are _____.
A. good sisters
B. good classmates
C. good friends
Peter is an American boy. He is thirteen years old. He is a middle school student. This is his family. His father and mother are in China now. He is in Class Eight, Grade Seven in No. 105 Middle School. He likes Chinese. Peter has a good friend. His name is David. He is in Class Eight, Grade Seven, too. He is twelve. David is from Japan. His father is in China, but his mother isn’t. Peter and David are good friends.Peter is from the USA.
Peter and David are in Class Eight, Grade Eight.
David’s father and mother are in China.
Peter is 13 and David is 12.
Peter and David aren’t good friends.