He found __ hard to work out the problem by himself .A this B tha_英语解答

He found __ hard to work out the problem by himself .
A this B that.C.it.D /

人气：334 ℃　时间：2019-10-08 09:50:21

解答

C
他发现很难独自解决这个问题
It 作形式宾语,真正宾语是后面的不定式短语to work out the problem by himself
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