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标题: GWD 23-31 [打印本页]

作者: giji_78 时间: 2008-7-6 21:57
标题: GWD 23-31

s搜了一下没有以前的讨论。

Q31:

According to some botanists, invasive plants are the second most serious threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems.

threat, after habitat loss, to native species of plants and animals and to the maintenance of biologically diverse ecosystems
threat, after habitat loss, to native species of plants and animals and for maintaining biologically diverse ecosystems
threat, after losing their habitat, to native species of plants and animals and also to maintenance of biologically diverse ecosystems
threat to native species of plants and animals and for maintaining biologically diverse ecosystems, after habitat loss
threat to native species of plants and animals as well as to maintaining biologically diverse ecosystems, after losing their habitat

Answer: A

why not B, 现在分词更能体现对动作的威胁。

期待nn指点

作者: blogfish 时间: 2008-7-21 04:08
考查parallelism，threat。。。 to native species。。。to the maintenance of。。。所以A

作者: AlienX 时间: 2008-7-21 09:53
B中的biological可以修maintaining跟diverse...所以不太好

作者: jintian 时间: 2009-7-18 15:47
,

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