A.being there | B.should there be | C.there was | D.there having been |
A.mustn"t | B.shouldn"t | C.needn"t | D.couldn"t |
A.must have;might have | B.might have;can’t have |
C.can have;should have | D.might;must have |
A.quit | B.to be quit | C.quited | D.quitting |
A.must make | B.must have made |
C.should make | D.could have made |
A.is | B.was | C.had been | D.were |
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