题目内容

Jimmy travelled to Africa last winter and all his money ______, so he has to do everything he can ______ money for another trip.

A.runs out of; saving B.ran out; save C.ran out; to save D.ran out of; to save

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A.Good idea. B.No problem. C.I think so.

________you keep trying, you might________ find hidden abilities within you.

A.As soon as; surprised B.As far as; surprising C.As long as; surprisingly

—I used the knife to cut things, but I cut my ______ (手指).

— You'd better ask the nurse to bandage them for you.

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 down(分解) PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can stay 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 found it while examining the structure 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 have made an improved enzyme. It's better than the natural one. And we are trying to make more improvements to it." He went on, "the enzyme is not bad for humans or animals, and it is friendly to the environment. So we are thinking about putting it into wider use."

The team is now trying to make the enzyme break down PET in large quantities (大量的). “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 researchers found that a natural enzyme helped eat plastics ______.

A.in Britain B.in the US C.in Japan D.in China

3.Which of the following 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 bad for humans and animals.

4.The passage is written in a / an______ tone(语气).

A.sad B.hopeful C.angry D.crazy

Thanks ______ your help, we are only able to make ______ possible for these homeless kids to have new home here.

A.for; it B.to; it C.for; that D.to; that

A: Excuse me, could you tell me the way to the Central Street?

B: Sure. It's very far from here. 1.

A: Which bus should I take?

B: 2. Here is the bus stop. I think the bus will come soon. And after getting off the bus, please walk along the street to the end, then you will arrive.

A: Thanks. And how long will it take me to get there?

B: 3. Traffic in our city is heavy now because the subway is being built. Is this your first time to come to Harbin?

A: Yes. It's my first time here.

B: 4.

A: I like it very much. The ice and snow is really beautiful.

B: Look! Here comes the bus!

A: Thanks. 5.

B: Me, too. Bye!

A.You can take No. 1 bus.

B.What do you like about Harbin?

C.How do you like Harbin?

D.You'd better take a bus.

E.I've been here twice.

F.I think it will take you one and a half hours.

G.It's really nice meeting you.

— Mom, I can't find my mask. Have you seen it?

— It_______ be in your backpack. I just put it there.

A.must B.might C.can

— It is too hard for me to make my dream come true.

— Never _________. Believe in yourself!

A.lose heart B.hurry up C.look up D.put up

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