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标题: og10 68求教 [打印本页]

作者: hillxzhang 时间: 2008-12-16 21:48
标题: og10 68求教

Often
        visible
        as
        smog, ozone is formed in the atmosphere from hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.
(A) ozone is formed in the atmosphere from
(B) ozone is formed in the atmosphere when
(C) ozone is formed in the atmosphere, and when
(D) ozone, formed in the atmosphere when
(E) ozone, formed in the atmosphere from

这题大家在看不懂专业单词的情况下如何利用考点去寻找选项？感激！

作者: aeoluseros 时间: 2008-12-17 19:27

umm..hydrocarbons and nitrogen oxides这两个词还是很常见的，所以尽量看懂吧。

考点的话，

1、A里面from是介词，后面不能跟句子。

2、C里面and when没有并列对象

3、D里面因为react要做when从句里的谓语，所以造成原句没有谓语。

4、E里面ozone跟react主谓单复数不一致。

作者: 热带鱼 时间: 2008-12-18 14:02

看到句子里面出现两个谓语，就要谨慎了。这两个谓语动词可能是并列或者主从关系，无论哪一种都要有个连词。介词是不行的

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