there are a large number of chemical factories，the air is likely to be polluted.A. That

发布时间：2020-08-17 13:41:44

     there are a large number of chemical factories，the air is likely to be polluted.
A. That
B. Where
C. Once
D. As

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A. That
(答案→)B. Where
C. Once
D. As
解析：where引导地点状语从句。句意：在有大量化工厂的地方，空气就很可能被污染。
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