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- 290581
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- 2007-11-6
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- 1970-1-1
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我选C while they have introduced some 100,000 dangerous chemical pollutants at the same time, which have 这里they指代 Industrialization and modern methods 。which指代pollutants,最后一个they were developped则和前面一个they指代内容一样methods。所以很清楚啊。也没记得规定说while后面必须省略什么。 然而B里由于之前they没出现过,这里就近指代pollutants感觉意思不对啊,要说指代methods那也相隔太远了吧。当中隔了while...that...since...然后去指代前面一个主语,这个。。。 求nn指点 |
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