题目内容

_____ seems difficult________ who broke the window.
A.This;to find outB.It;to find out
C.That;finding outD.It;finding out
            
试题分析: 句意: 找出谁打破窗户似乎很困难。It seems +adj+to do做某事似乎……的,固定句型,it 为形式主语,to do不定式做真正主语,故答案选B.
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