--the problem is too difficult ,can you show me ______ ------sure .
A.what to work it out B.what to work out it C.how to work it out D.how to work out it .
人气：300 ℃ 时间：2020-03-27 07:02:15
解答
C.how to work it out
work out 算出,解出,有宾语 It,所以不选代词what 而选副词how
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