想请教3道PREP的语法，谢谢~

cindypalau · 发表于 2009-11-8 04:20:36

14. The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.

我选：twice as many as the increase in
选doubling the increase of是因为前面有flying吗？

21. The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.
A. both dating
B. both of which have dated
C. and each has dated
D. and each one dating
E. each one of which date
答案是A，我以为C更能表达意思。讲两个和讲一个有什么不同？

41. Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.
A. …
B. Neuroscientists, having amassed a wealth of knowledge about the brain and its development fro birth to adulthood over the past twenty years, and are
C. Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
D. Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood.
E. Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood.
我选E，不太懂为什么要选A，不选E.

lorrain_cc · 发表于 2009-11-8 04:24:24

41的E明显把从属和主要成分对换了,having amassed...是做状语修饰neuroscientists的,而不应该做谓语,主要成分是“得出结论”

lorrain_cc · 发表于 2009-11-8 04:29:52

14.我觉得是比较对象的问题,twice as many as the increase in the previous year,是increase和什么比???
而doubling the increase of the previous year就很清楚,doubling现在分词做伴随结果状语,修饰rose,也就是rose的这个结果,使得今年的increase翻了翻

lorrain_cc · 发表于 2009-11-8 04:34:25

21.both应该是communities的同位语吧??
然后dating...作为定语修饰both
dating本是从属部分,做修饰用的,C中把它当成并列句了

cindypalau · 发表于 2009-11-9 23:30:42

想请问是不是有"and前面不该有逗号“这么一说？

lorrain_cc · 发表于 2009-11-9 23:53:51

and?
and若连接两个句子,如果主语相同,在没有逗号的情况下,并列的第二句是要省主语的,如果有了逗号,则主谓都要补齐,MM是指这个??

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