问题
选择题
__________ there are a large number of chemical factories，the air is likely to be polluted.
A．That
B．Where
C．Once
D．As
答案
B
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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__________ there are a large number of chemical factories，the air is likely to be polluted.
A．That
B．Where
C．Once
D．As
B
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。