[求助]几道语法题,请大家帮忙解答,感激万分

chasedream1025

1992年05月语法题

u       22. In some occupations, the computer has already replaced the motor vehicle as the principal conserve of time and laboring.

答案：D

分析：and要求两边连接的成份同词性、同性质．and前为名词time，and后也应用名词。应为labor。

问题：laboring 也是名词，为什么这里不能用它了，labor跟laboring在做名词时有什么区别啊？

1992年10月语法题

15.In general, the simpler plants appeared on the Earth before those -C--.

(A) are structurally complicated

(B) more complicated structure

(C) have a complicated structure

(D) their structure is complicated

答案：B

分析？

1993年10月语法题

u       38. A majority of the reports received from people claiming to have seen the legendary Loch Ness Monster have proven to be mistakes, misconceptions, or they were being tricked.

答案：D

分析：连词or与and一样，要求所连接的成分同词性、同性质。or前边是名词mistakes和misconceptions，后面也应是名词，不能是句子。应为tricks。

这里的C  have proven to be 中的prove 为什么不用被动啊？

1994年05月语法题

10. Their keen senses of hearing and smell have made some types of dogs ___ in hunting and tracking and as security guards.

(A) as valuable

(B) of the value

(C) are valued

(D) valuable

答案：D

分析：Make sth+形容词是固定短语，是TOEFL考试中常见的题型．空格前已有made十宾语，所缺为形容词补语，故选(D)

后面那个as怎么解释啊，不是有as….as 结构吗？

39. Preceding the United Stated Naval Academy was founded in 1845, sailors were trained at sea.

答案：A

分析：preceding是形容词或动词，不能引导从句．应为Before.

如果把was founded 改成定语形式，which was found 的话A的答案不是可以吗？

求preceding的用法？

1995年08月语法题

36. The early periods of aviation in the United States was marked by exhibition flights made by individual fliers or by teams of performers at country fairs.

答案：A分析：改为period，后面动词为was，前面为单数。

参考译文：米国早期航空领域具有明显的标志，由个人飞行者或执行国家事务的成队表演者组成的飞行展览会。

这里B的结构怎么分析呢？我总觉得应该是flight exhibition？