选b.这是强调句型中的对疑问词强调.
用强调句型：“It is（was）＋被强调的部分＋that（who）＋原句其它部分”
强调疑问词：疑问词+is（was）it +that ＋原句其它部分
例如：What is he doing?
What is it that he is doing?
what was it ____caused the forest fire?a)who b)that
what was it ____caused the forest fire?a)who b)that
请问为什么选B
请问为什么选B
英语人气：759 ℃时间：2020-02-03 10:45:18
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