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SC讨论
Tiny quantities of more than thirty rare gases, most of them indurtrial by-products, threaten (to warm the Earth's atmosphere even more rapidly than carbon dioxide during teh next fifty years.)
B.to warm the Earth's atmosphere even more rapidly over the next fifty years than carbon dioxide will
正确答案是B,我选的A
是不是因为A,没有补出动词,所以不对。想问的是比较从句,什么时间要补出动词,什么时间可以省略?有没有什么准则?多谢!!!!!
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我的意见:A的错误是没有补出动词,造成歧义,似乎为warm了carbon dioxide 而B中补出了will既可消除歧义,又与next fifty years时态一致
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