Unit 1 friendship grammar课时作业

Ⅰ.根据句意，用所给单词或短语的适当形式填空

at a time　take an active part in　keep an eye on　set up

as a result　introduce　include　be concerned about sth.

in danger　be home to

1．All flights have had to be cancelled ________ of the pilots' strike.

答案：as a result

2．Mary offered to ________ the baby while I went out.

答案：keep an eye on

3．The army has ________ road blocks round the city.

答案：set up

4．Our tour party ________ several retired couples.

答案：included

5．How can you expect me not to ________ my own son?

答案：be concerned about

6．We had to see the nurse one ________.

答案：at a time

7．A large sum of fund has been ________ to the company.

答案：introduced

8．At college I ________ student politics.

答案：take an active part in

9．Joseph is doing what he can to save animals ________.

答案：in danger

10．It ________ the Chinese Academy of science and more than ten famous univesities, including Peking University and Tsinghua University.

答案：is home to

Ⅱ.单项填空

1．While watching television，________.

A．the doorbell rang

B．the doorbell rangs

C．we heard the doorbell ring

D．we heard the doorbell rings

答案与解析：C　题干中的非谓语动词形式是现在分词(watching)，那么后面句子的主语与watch必须是主谓关系，肯定是人，可以排除A项和B项。选项D时态不对。

2．One lost in forests will be________because there are ________ animals and other________.

A．danger; dangerous; in danger

B．dangerous; danger; dangers

C．in danger; dangerous; dangers

D．dangerous; dangerous; in danger

答案与解析：C　in danger指处于危险之中；danger指危险的人物或事物。句子的意思是"一个人在森林里迷了路是危险的，因为会有危险的动物和其他危险的情况"。

3．Do you think there is someone________ the honour in our class?

A．worth　　　　　　　　 B．worthy