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． |
Many students have already had clear ideas about what jobs they would like to have in the future. We believe boys’ choices are different from girls’. To find out how different their choices are, we made a survey in Green High School. The following diagram shows the results of the survey. 
About 45% of the girls would like to be ________ in the future.
| A．bank clerks | B．reporters | C．scientists | D．teachers |
About ________ of the boys want to be teachers as well.
| A．5% | B．15% | C．28% | D．38% |
Which job do the girls like least?
| A．Bank clerks | B．Reporters | C．Managers | D．Scientists |
What does the diagram show us?
| A．Boys’ abilities of jobs are the same as girls’. |
| B．Boys’ abilities of jobs are different from girls’. |
| C．Boys’ choices of jobs are the same as girls’. |
| D．Boys’ choices of jobs are different from girls’. |
Which of the following statements is TRUE?
| A．More girls would like to be reporters than boys. |
| B．More boys would like to be bank clerks than girls. |
| C．Boys would like to be reporters most. |
| D．Girls would like to be managers most. |
Many people are so busy these days that they have no time to cook at home. This becomes a problem because most families love home cooking! The food tastes good and a family meal can bring everyone together. In some families, meals are often the only chance everyone gets to see each other at the same time during the day.
Another reason people enjoy home cooking is that it is a way of showing love. A parent who makes some cookies is not just satisfying a child’s sweet tooth. He or she is sending a message (信息). The message says, “I care about you enough to spend an hour making cookies that you will eat up in 15 minutes if I let you.” There is also something about the smell of home cooking. The smell of cooking makes people happy. It makes most of us feel good and loved--even if we’re the ones doing the cooking! Next time you smell a cake making, stop for a moment and pay attention to your mood (心情，心境).Why do many people have no time to cook?
| A．Because they haven’t many things to do. |
| B．Because many people are too busy. |
| C．Because people don’t like home cooking. |
| D．Because they are too tired to cook. |
Home cooking is __________.
| A．good and warm | B．a way of showing love |
| C．satisfying a child’s tooth | D．Both A and B |
The writer thinks the smell of home cooking _____________.
| A．makes us feel good and loved | B．makes us be interested in cooking |
| C．makes us excited | D．makes us love others |
What’s the main idea of the passage?
| A．Home cooking is important. | B．Home cooking feels good and loved. |
| C．People are too busy to cook. | D．Home cooking cookies taste better. |
My tears run down from my cheeks (面颊) when I talk to my parents on the phone. What are they doing when I call them? Dad works from seven o’clock in the morning to nine o’clock in the evening. My mum does all the housework, she also has to work in the field. But I can’t do anything for them.
Every day she gets up at around 4 o’clock in the morning. When I sometimes call her at 7:30 in the evening, she tells me that she is still in the field and doesn’t have supper. I tell her I’ll study hard in the school. I also ask her to take care of herself and dad because I can’t live without them.
Mum says that the happiest time for dad and her is when my sister and I come back home.
We play cards in the room, watch TV, or do anything we like, with dad and mum making delicious food in the kitchen. It is also the happiest time for me.
Love, sometimes, doesn’t need many words. Love your parents like they love you. Give them a call, tell them you miss them.Why can’t the writer live without their parents?
| A．Because her parents give her money. |
| B．Because her parents need her to take care of them. |
| C．Because she loves her parents and they love her very much. |
| D．Because they afford (提供) her education (教育). |
The happiest time for the writer’s mum and dad is____________.
| A．she and her sister help them make delicious food in the kitchen |
| B．her sister and her coming back home |
| C．they play cards in the room |
| D．they work in the field together |
Which of the following is the best title?
| A．Mum and Dad | B．I love you, Mum and Dad |
| C．My Family | D．I Love My Family |
People like to say “Thank you” when others help them or say something kind for them. It is a very good habit.
You should say “Thank you” when someone walking ahead of you keeps the door open for you, when someone says you have done your work well, or you have bought a nice thing, or your city is beautiful. We can use “Thank you” not only between friends, but also between parents and children, brothers and sisters.
“Excuse me” is another short sentence we often use. When you hear someone say so behind you, you know that somebody wants to walk pass you without touching you. When others are talking, if you want to speak to one of them, say “Excuse me” first, and then begin talking. You should also do so when you begin to cough or make any noise before others.
Let’s learn to say “Thank you” and “Excuse me”.You should say “Thank you” when__________.
| A．you say something kind to others | B．you help others |
| C．someone helps you | D．you are in trouble |
When you are going to ask someone to tell you the way, you should say “_______”.
| A．Thank you | B．That’s very kind of you |
| C．Excuse me | D．The same to you |
The passage mainly tells us the way____________.
| A．to be happy | B．to be polite |
| C．to help others | D．to be healthy |
Our school has a big library. We often go there. Today is Sunday. Lily and I are in the library. In the library there are some signs on the wall. The signs mean (意思是) different (不同的) things. We know them. Don’t shout in the reading room. Don’t drink or eat here. Don’t litter (乱扔东西) in the library.
I see a man smoking in the reading room. I go to him and say, “Sir, you can’t smoke here. Look at the sign. It says ‘No smoking’.You can smoke in the smoking room.” The man says sorry. Which sign means “Don’t litter”?
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A B C DWhat are there on the wall of the library?
| A．Pictures | B．Maps | C．Signs | D．Photos |
The man can smoke __________________.
| A．in the reading room | B．in the smoking room |
| C．anywhere (任何地方) in the school | D．in the library |
Where are Lily and I?
| A．In the park. | B．At the cinema. | C．In a shop. | D．In the library. |
In the library _____________.
| A．you can eat or drink | B．you can smoke |
| C．you can’t talk loudly (大声地) | D．you can litter |