781] As middle school students, we _____ the police to keep order.

[译文] 作为中学生，我们过去常常帮助警察维持交通秩序。

　 A. are used to help 　 B. used to helping

　 C. used to help 　 D. used to be helped

[答案及简析] C。 used to do sth. 过去常常做…；be used to doing sth.习惯语做…。

780] The teacher said he needed _____ boys besides his students _____ the classroom.

[译文] 老师说他还需要20个男孩帮助他打扫教室。

　 A. 20 other; clean 　 B. 20 more; to clean

　 C. 20 more; cleaning 　 D. another 20; clean

[答案及简析] B。 another 20 students = 20 students more；　后面是不定式作目的状语。

779] If you keep on, you’ll succeed _______.

[译文] 如果你继续的话，你迟早会成功的。

　 A. in time 　 B. at one time

　 C. at the same time 　 D. on time

[答案及简析] A。 in time及时，迟早；at one time先前，以前；at the same time同时；on time准时。

778] We had a hard life _____ in my childhood.

[译文] 在我童年的时候，我们曾经一度生活很艰难。

　 A. at a time 　 B. at all times

　 C. at one time 　 D. at any time

[答案及简析] A。 at a time曾经一度； at all time总是； at one time 先前，以前；at any time任何时候。

777] -----Why does Ling Ling look so unhappy? 　-----she has_____ by her classmates.

[译文] --怎么这样不高兴呀？　　--她被班上同学嘲笑了。

　 A. laughed 　 B. laughed at

　 C. been laughed 　 D. been laughed at

[答案及简析] D。 动词laugh是不及物动词，表示嘲笑得在后面加上介词at。

776] ----You’re drinking too much. ----- Only at home. No one ______ me but you.

[译文] --你真的喝醉了。　　--只是在家里。除了你谁也看不见我喝醉了。

　 A. is seeing 　 B. had seen

　 C. sees 　 D. saw

[答案及简析] C。 情景英语。该句说的现在的情况，故用现在时态。

775] I really can’t decide _____ first. A small computer or a big one?

[译文] 开初，我真的难决定，是买大的电脑还是买小的？

　 A. what to buy 　 B. to buy what

　 C. which to buy 　 D. to buy which

[答案及简析] C。 在两种中选择，用which。

774] -----Was the class long enough? -----No, _______ enough.

[译文] --这节课够长的吧？　　--不，不太长。

　 A. it wasn’t much too long 　 B. it wasn’t too much long

　 C. it wasn’t quite long 　 D. it wasn’t too long much

[答案及简析] C。 enough 不能与too连用。

773] The government of the country is trying to _____ the prices for foods in order to please people.

[译文] 为了使人民满意，政府正在降低物价。

　 A. bring down 　 B. take down

　 C. put down 　 D. lay down

[答案及简析] A。 bring down降低物价；take down放下；put down镇压；lay down放下。

772] Is _____ possible to fly to the moon in a spaceship?

[译文] 乘飞船到月球有可能吗？

　 A. now 　 B. man

　 C. it 　 D. that

[答案及简析] C。 It is + adj. + to do sth.句型。