问题 句型转换

按要求写句子。

1. She has fun playing soccer there. (改为一般疑问句) 

    _____  she _____ fun playing soccer there?

2. Do you often take a boat to work? (改为同义句)

    Do you often _____ to work _____ _____?

3. Mary has a brother and a sister. (改为否定句) 

    Mary _____ _____ a brother _____ a sister.

4. It takes me twenty minutes to get to school. (改为同义句)

    I _____ twenty minutes _____ to school.

5. Sally never goes to the market by bike. (同上) 

    Sally never _____ _____ _____ _____ the market.

6. It takes me half an hour to read English. (对画线部分提问) 

     _____ _____ ______  it _____ you to read English?

7. The little boy often goes to school by bike. (同上)

     _____  _____    the little boy often _____ to school?

8. He goes to school on foot. (改为同义句) 

    He _____ _____ school.

答案

1. Does; have

2. go; by boat

3. doesn't have; or

4. spend; getting

5. rides her bike to

6. How long does; take

7. How does; go

8. walks to

单项选择题

It is clear that some chemicals can damage the health of animals and humans. (1) , this is not the only problem that (2) be caused by the careless use of chemicals. Chemicals can also (3) the ecological balance of the environment. If the ecological balance is disturbed, the results can be (4) serious.The (5) of DDT illustrates the problem. DDT, a chemical which kills insects, at first seemed to be a perfect answer (6) many problems. It would control insects that caused dangerous diseases, (7) insects that caused billions of dollars of damage to crops every year. Governments permitted and even (8) the use of DDT. Farmers in many countries (9) to spray it on their crops. The (10) results were good. Damage to crops (11) down, and profits went up. However, the chemical had effects which the scientists didn’t see in (12) . First, it also killed insects which were the (13) enemies of the harmful insects and which were therefore beneficial to farmers. Second, and perhaps worse, DDT did not kill (14) harmful insect. A few insects had natural resistance to the chemical. They (15) and reproduced in large numbers. In a few years there were large numbers of insects which were not (16) by DDT, and there were (17) insects which Could act as natural (18) on these new "super-insects". Finally, it became clear that DDT was not solving the insect problem. In fact, it was making the problem worse. It (19) became necessary to find a second (20) for the effects of the first.

第(8)空应选择()

A.asked

B.requested

C.declared

D.encouraged

问答题 简答题