河南东方今典集团:HELP ME!!!!!
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We didn't know ______such a difficult problem.
A.why we should deal with B.why to deal with
C.what to do with D.what we should do with
A.why we should deal with B.why to deal with
C.what to do with D.what we should do with
C.what to do with
what to do with =how to deal with如何解决
C don't know what to do
C.what to do with