15. Not once                Michael that he could one day become a top student in his class. (occur)

Michael不止一次地想到有朝一日他可以成为班上的顶尖学生。

14.        some famous scientists who came from all walks of the country. (present)

出席会议的是来自该国各个行业的一些著名科学家。

13. He is going to spend the Spring Festival in his home village，             his parents and some relatives. ( live)

他打算到他的家乡过春节，他的父母和亲戚还生活在那里。

12.1 was sitting under the tree in front of my house reading when          a cat at a running mouse in the corner. (down)

我正坐在门前的树下看书，突然一只猫从树上向在墙角跑的老鼠朴了下来。

11.            the possibility that mistakes have been made  in the work. (remain)

工作中仍然有可能出差错。

10.------- I was wondering if we could go skiing on the weekend.

  ------        . ( sound)

  ——我想我们在周末去滑冰吧。——(这主意) 听起来不错。

9.             ，the company has about 1 ，000 buyers in over 30 countries. (though)

尽管很小，但该公司在30多个国家有约1000名顾客。

8. ―Can I borrow your car,Mum?

―        . (must)

——妈妈，我能借用下你的车吗？ ——如果你非借不可的话(你就借吧) 。

7. Not only        the disabled to find jobs,but also medical treatment will be provided for those who need it. (give)

不仅要帮助残疾人找工作，还应为有需要的人提供治疗。

6. "Never for a second ,"the boy says, "        that my father would come to my rescue." (doubt)

那男孩说："我从没怀疑过我父亲会来救我。"