有答案，但是不是很理解，欢迎讨论。（FROM LZM BOOK）
7．Some psychiatric studies indicate that among distinguished artists the [U]rates of manic depression and major depression are ten to thirteen times as prevanlent as in[/U] the population at large.
(A) the rates of manic depression and major depression are ten to thirteen times as prevanlent as in
(B) the rates of manic depression and major depression are ten to thirteen times more prevalent than in
(C) the rates of manic depression and major depression are ten to thirteen times as prevalent when compared to
(D) manic depression and major depression are ten to thirteen times more prevalent than in
8．Never before had taxpayers confronted [U]so many changes at once as they had in[/U] the Tax Reform Act of 1986.
(A) so many changes at once as they had in
(B) at once as many changes as
(C) at once as many changes that there were with
(D) as many changes at once as they confronted in
(E) so many changes at once that confronted them in
9．Despite the recent election of a woman to the office of prime minister,the status of women in Pakistan [U]is little changed from how it was [/U]in the last century.
(A) is little changed from how it was
(B) is a little changesdfrom how it was
(C) has changes little
(D) has changed little from how it has been
(E) is little changed from the way it was
10．Salt deposits and moisture threaten to destroy the Mohenjo-Karo excavation in Pakistan,the site of an ancient civilization [U]that flourished at the same time as the civilizations[/U] in the Nile delta and the river valleys of the Tigris and Euphrates.
(A) that flourished at the same time as the civilizations
(B) that had flourished at the same time as had the civilizations
(C) that flourished at the same time those had
(D) flourishing at the same time as those did
(E) flourishing at the same time as those were
Louisa_xy：请教一下！
9题。虽然from the way it was 好像多余，但它表明change发生在本世纪。若无，则成了has changes（应为changed！是我太太不小心敲错了） little in the last century。改变了原句意思。LZM的答案也是c，偶觉得有点费解。
10题。什么情况下可以不补出动词：did？ C就有had。
谢谢你的解答！真得获益很多。BTW,由于时间紧张（1月24日上战场），前几次是我太太帮我发的帖子。也非常感谢Mush的几次回复！作者: Louisa_xy 时间: 2003-1-13 18:56
9.C 不是perfect,但是best.如果把in the last century改成since...更好一些。
A、B、E用现在时is是错的，D里 from how it has been in the last century时态也是错的，C虽不完美，但是最佳的选项。
谢谢Louisa的及时回复。
我觉得the recent election 用is，in the last century用was，不挺好的对比吗？题干里没有明显的过去时间（除了in the last century以外）标志呀，怎么不能用is呢？再说白大侠强调逻辑意思优先的呀。 还是有点不开窍（十窍已经通了九窍）。作者: Louisa_xy 时间: 2003-1-13 20:08
"is little changed from how it was"
redundant,little的位置不好，而且不如现在完成时好。has changed little就是你要表达的意思
^_^我快没窍了作者: justag 时间: 2003-1-14 04:23
I have finished my research in the past three days~~~
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