21. Every man, woman and child ______ some history, enough at least, to survive in the world.

        A. knows   B. know   C. is known   D. are known

        【答案】A。每个男人，女人和孩子，都知道一些历史，至少足够在这个世界上生存。当用and 连接的名词前面有each，every 等修饰时，谓语动词用单数。

        22. Each of you ______ responsible for the accident.

        A. am   B. be   C. is   D. are

        【答案】C。你们每个人都对事故负有责任。当用and 连接的名词前面有each，every 等修饰时，谓语动词用单数。

        23. Each man and woman ______ the same rights.

        A. has   B. have   C. had   D. is having

        【答案】A。每个男人和女人享有相同的权利。当用and 连接的名词前面有each，every 等修饰时，谓语动词用单数。

        24. Every means ______ tried but without much result.

        A. has been   B. have been   C. are   D. is

        【答案】A。每种方法都被试过了，但是没有太多结果。当用and 连接的名词前面有each，every 等修饰时，谓语动词用单数。

        25. Every possible means _____ to prevent the air pollution, but the sky is still not clear.

        A. is used     B. are used      C. has been used     D. have been 'used

        【答案】C。每种阻止空气污染的可能的方法都尝试过了，但是天空依然不是很明朗。当用and 连接的名词前面有each，every 等修饰时，谓语动词用单数。

        26. One or perhaps more pages _______.

        A. is missing   B. has been missed   C. are missing   D. was missing

        【答案】C。一页或者更多页找不到了。由or连接两个并列主语时，根据就近原则决定谓语动词的单复数。

        27. The manager or his assistant ______ planning to go.

        A. were    B. are   C. was    D. be

        【答案】C。经理或者他的助理，计划去。由or连接两个并列主语时，根据就近原则决定谓语动词的单复数。

        28. Neither Tom nor his parents ______ at home.

        A. is     B. are   C. has    D. was

        【答案】B。汤姆或者他的父母在家。由neither…nor…连接两个并列主语时，根据就近原则决定谓语动词的单复数。

        29. Either the dean or the principal ______ the meeting.

        A. attends   B. attend   C. are attending   D. have attended

        【答案】A。院长或者校长在出席会议。由either…or…连接两个并列主语时，根据就近原则决定谓语动词的单复数。

        30. ______ was wrong.

        A. Not the teacher but the students      B. Both the students and the teacher

        C. Neither the teacher not the students   D. Not the students but the teacher

        【答案】D。不是学生，而是老师出了错误。由not…but…连接两个并列主语时，根据就近原则决定谓语动词的单复数。