补全对话A: 1. B:Yes,please.I want a pair of trousers.A:What about these blue trousers?B:I don’t like blue.A:2. B:B1ack.A:These are black trousers.3.B:Yes.They are nice. 4.A:60 dollars.B: 5.Thank you ve 题目和参考答案——青夏教育精英家教网—

题目内容

补全对话

A: 1.

B:Yes,please.I want a pair of trousers.

A:What about these blue trousers?

B:I don’t like blue.

A:2.

B:B1ack.

A:These are black trousers.3.

B:Yes.They are nice. 4.

A:60 dollars.

B: 5.Thank you very much.

A:You’re welcome.

A.I’ll take them.

B.What color do you want?

C.Can I help you?

D.Do you like them?

E.How much are they?

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Today there are 6.4 billion people on the earth. By the year 2050 there may be 12.5 billion. There are many people to feed. We need more and more food.

One way to produce more food is growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic (遗传的) material. Foods from plants grown in this way are called genetically modified (转基因的) foods, or GM foods.

By changing the genetic material of a plant, it is possible to make new plants. Scientists make plants which are strong against plant diseases. They can also help in our diseases; a kind of rice will be grown, for example, which stops people becoming blind.

Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.

GM plants are not natural. No one knows how good or bad they are. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them because they are unnatural. They may feed people, then hurt them or their children later. But both rich and poor countries are interested in their uses, and they are not going to go away. In 2050, we may think differently about them.

1.There may be billion people by the year 2050 on the earth.

A.6.4 B.12.5 C.18.5 D.20.5

2.How have scientists been able to change plants more quickly?

A.By making the best plants. B.By asking the farmers to grow plants.

C.By changing planting environment. D.By changing their genetic material.

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A.Because they are easy to grow and bring in more money.

B.Because they are easy to grow and very cheap.

C.Because they help produce more food.

D.Because they are the best plants.

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A.GM plants are not natural.

B.GM plants are strong against plant diseases.

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5.What can we learn from the passage?

A.GM foods will go away one day in the future.

B.GM foods will not go away in the future.

C.People will not be interested in GM foods.

D.People will have to stop eating GM foods.

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