Scientists in Britain and the United States have made a new kind of enzyme（酵素）that eats plastics（塑料）． With its help， plastics can be turned into smaller parts and go away quickly． Scientists believe that， in the future， it could solve the problem of plastic pollution．
The enzyme is able to break downPET， a form of plastic． PET was first made in the 1940s and is now widely used to make plastic bottles． It can remain in the environment for many years and pollute large areas of land and water． So it has always been a headache to deal with the waste from PET and other plastics．
The researchers made the discovery（发现）while examining the structure of a natural enzyme in Japan． They found that the natural enzyme was helping to break down PET plastics． So， they decided to make small changes to the enzyme by adding some amino acids（氨基酸）． It made the natural enzyme's plastic﹣eating abilities work faster and better．
John McGeehan， one of the lead researchers， said， "We've made an improved enzyme． It's better
than he natural one． And we are trying to make more improvements to it． "He went on， "The enzyme is not harmful to humans or animals， and it is friendly to the environment． So we are considering putting it into wider use．"
The team is now trying to make the enzyme break down PET in large quantities（大量地）．"We'll see that the plastic pollution may be stopped with this technology． However， there is still a long way to go，"John McGeehan added．
（1）According to the scientists， the enzyme may solve the problem of pollution．
| A． |
air |
| B． |
water |
| C． |
light |
| D． |
plastic |
（2）The underlined phrase "break down" in the passage probably means " " in Chinese．
| A． |
实验 |
| B． |
生产 |
| C． |
发明 |
| D． |
分解 |
（3）Researchers discovered that a natural enzyme helped eat plastics ．
| A． |
in Britain |
| B． |
in the US |
| C． |
in Japan |
| D． |
in China |
（4）Which of the following is TRUE according to the passage ？
| A． |
The scientists are still trying to improve the enzyme． |
| B． |
The enzyme will pollute large areas of land and water． |
| C． |
The natural enzyme works better than the improved one． |
| D． |
The natural enzyme is harmful to humans and animals． |
Jay Chou was born on January 18,1979, in Taiwan, China. He grew up with his mother,and was a quiet and shy kid. He didn’t do well in study,so people thought he would never be successful in life.
As a small child, Jay took a great interest in music. His mother sent him to learn the piano when he was only three yars old. He loved it and kept on practicing. When he was in high school,he could play the piano quite well. At the same time,he showed his talent for writing songs.
Before Jay became a singer,he worked as a songwriter. For two years,he spent most of his time writing for singers. Some of them were very famous,like Coco Less and Jacky Cheung. Jay released(发行) his first album(专辑) in 2000 and soon he got quite popular.
Now Jay is one of the most famous sigers in Asia. However,he is still shy and doesn’t speak clearly when he sings or talks,but he has a lot of fans.Most of his fans like him because he is really good at music and never follows(仿效) others.When Jay Chou was a small kid,.
①he was quiet and shy
②he lived with his parents
③he didn’t study well
④he loved music
| A．①③ | B．①④ | C．①③④ | D．②③④ |
Jay Chou’s mother sent him to learn the piano .
| A．in 1982 |
| B．when he was in primary school |
| C．when he was five |
| D．when he was in high school |
Jay Chou wrote songs for two years.
| A．for himself |
| B．for his friends |
| C．for his mother |
| D．for Coco Lee,Jacky Cheung and some other singers |
Which of the following is true?
| A．When he talks or sings, Jay Chou can both speak clearly. |
| B．When he sings,Jay Chou can’t speak clearly.When he talks,he can’t ,either. |
| C．When he talks,Jay Chou can’t speak clearly.But when he sings,he can. |
| D．When he sings,Jay Chou can’t speak clearly. But when he talks,he can. |
Which of the following about Jay Chou is NOT true .
| A．He is a good-looking singer. |
| B．He has a lot of fans |
| C．He hardly ever smiles |
| D．His songs are different from others |
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. China Linda is _____.
A. Lucy’s sister
B. Lily’s sister
C. Jack’s sisterLinda 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 schoolsJack, 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.
Mike and Dick work in the same office. They don’t like the cold weather. And one day they decided to take their holiday in Australia. Their plane arrived in Sydney at nine in the morning. They had a good rest in a hotel. The next morning they rented (租) a car in the city and began their travel. A few hours later, the sun was shining in the sky and there were no shade trees (遮阴树) beside the road. It was so hot that they could hardly go on driving. They had to stop to look around. Mike found a river about half a kilometer away from them. They were both very happy and drove the car quickly. Soon they got to the river. Before they jumped into the water, Dick saw a boy playing under a big tree. He asked,“Are there any sharks (鲨) in the river, boy?”“No, there aren’t,”answered the boy. So they began to swim in the river. After a while, Dick felt something hit against his leg. He told Mike about it. They were afraid and stopped swimming. Dick asked loudly,“Is it true that there aren’t any sharks in the river?”“Yes, sir,”said the boy,“There’re a lot of crocodiles (鳄鱼) in the water. All the sharks have swum away!”
根据短文内容，回答问题。When did they arrive in Sydney?
_______________________________________What was the weather like the next day?
_______________________________________What did they do in the river?
_______________________________________A shark hit Dick’s leg, didn’t it?
_______________________________________Why weren’t there any sharks in the river?
_______________________________________