18. Either Carol or Grace ______ to the concert， but one of them has to stay home.

　　A. is coming B. are coming C. will coming D. have come

　　either……or 谓语动词与临近主语一致。

　　答案 A

19. The total amount of money ______ 100 dollars.

　　A. is B. are C. has D. have

　　money 不可数名词，谓语动词单数。

　　答案 A

20. Great quantities of fish _____ on high seas.

　　A. is caught B. are caught C. catch D. is catching

　　quantities 复数形式

　　答案 B

21. Either of the young ladies _____ perfectly qualified to teach Greek and Latin.

　　A. is B. are C. has D. have

　　either打头，谓语动词单数。

　　答案 A

22. Having studied your report carefully， I am convinced that neither of your solutions _____ correct.

　　A. are B. is C. had D. will

　　neither 两者都不，谓语动词单数。

　　答案 B