A.could | B.would | C.was able to | D.should |
A.Can’t | B.Wouldn’t | C.May not | D.Won’t |
A.was there | B.wasn’t it | C.usedn’t there | D.usedn’t it |
A.can | B.would | C.might | D.should |
A.could have attended | B.must have attended |
C.could attend | D.shouldn"t have attended |
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