求助一道GMAT语法题~Tropical bats play important roles in the rain forest ecosystem,aiding in the dispersal of cashew,date,and figseeds; pollinating banana,breadfruit,and mango trees; and indirectly help produce tequila by pollinating agaveplan

求助一道GMAT语法题~Tropical bats play important roles in the rain forest ecosystem,aiding in the dispersal of cashew,date,and figseeds; pollinating banana,breadfruit,and mango trees; and indirectly help produce tequila by pollinating agaveplan
求助一道GMAT语法题~
Tropical bats play important roles in the rain forest ecosystem,aiding in the dispersal of cashew,date,and fig
seeds; pollinating banana,breadfruit,and mango trees; and indirectly help produce tequila by pollinating agave
plants.
(A) pollinating banana,breadfruit,and mango trees; and indirectly help produce
(B) pollinating banana,breadfruit,and mango trees; and indirectly helping to produce
(C) pollinating banana,breadfruit,and mango trees; and they indirectly help to produce
(D) they pollinate banana,breadfruit,and mango trees; and indirectly help producing
(E) they pollinate banana,breadfruit,and mango trees; indirectly helping the producing of
这道题C为什么错,不是说分号后面也要接一个完整的句子吗

求助一道GMAT语法题~Tropical bats play important roles in the rain forest ecosystem,aiding in the dispersal of cashew,date,and figseeds; pollinating banana,breadfruit,and mango trees; and indirectly help produce tequila by pollinating agaveplan
这道题答案是B
主语是bats,谓语是play.逗号后aiding是状语.原文有平行,aiding…; pollinating…；and helping….是并列的现在分词作状语分号表示列举.从常识来看,不可能是play和help的平行,所以原文句子A结构有问题.
helping,与aiding和pollinating平行.因此B选项结构上没有问题.
C选项,原文第一个分号明显是列举,在状语aiding和pollinating之间.但是C选项第二个分号就变成了连接两个句子,后面的句子是they help.因此C选项明显改变原文语义.
D选项把pollination之后的语义从状语变成了有主语they的句子.结构的改变引起了语义的改变.
E综合了C和D的错误.
句子主干Tropical bats play important roles ,aiding in the dispersal ; pollinating trees; and helping produce tequila .

答案是C

你可以通过下面的句子来感觉：
1 The work is(现在) more difficult than it was（过去） expected to be
2 John works（现在） harder than he was （过去）expected to

如果选B/D,句子是blabla is xxer than was...

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答案是C

你可以通过下面的句子来感觉：
1 The work is(现在) more difficult than it was（过去） expected to be
2 John works（现在） harder than he was （过去）expected to

如果选B/D,句子是blabla is xxer than was predicted ------去掉as。THAN就成了从句部分的主语。than是从句部分的连接词，也是从句的主语。

这种类型的考试，语感matters a lot apart from the fact that you need to have a very good knowledge of English grammar.

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