11. You ought to have asked Louis about that,() .

A. haven’t you B. hadn’t you √C. oughtn’t you D. didn’t you

12. The number of students in this college () this year.

A. are increased B. have been increased

√C. has been increased D. is increased

强调的是其数目，用单数;

13. Nobody but Smith and John () in the laboratory yesterday.

A. are B. were √C. was D. had

Nobody 强调个体时用单数;强调数量时用复数，如第35题;

14. Neither Bill nor his parents () at home today.

A. is √B. are C. stayed D. has

Neither …nor…. Either….or……

Not only….but also …. Not….but….

其谓语动词单复数依就近原则确定;

15. Dr. smith together with his wife and two sons() to arrive this evening.

A. are B. are going C. will be √ D. is

依主语结构中的中心词原则;

16. A new television series () that they can and should think about

career development.

A. teach handicapped children B. taught handicapped children

√C. teaches handicapped children D. teaching handicapped children

series单复数相同;信号词为A new ….

17. I , who () one of your sincere friends, will try my best to help you out

of this trouble.

A. be B. are √C. am D. is

18. At the rail station() a soldier and two young ladies on their way to

New York.

A. was B. is C. be √D. are

信号词为and ;

19. Ninety-three million miles from the Earth to the Sun() a long distance.

A. seem √B. seems C. seeming D. seem to be

表示距离等概念的，用单数;

20. That singer and dancer () our evening party.

A. are to attend √B. is to attend C. were to attend D. is attended

信号词为that ;