A.can’t | B.needn’t | C.mustn’t | D.don’t |
A.can | B.could | C.would | D.should |
A.maybe | B.couldbe | C.wouldbe | D.shouldbe |
A.canbe | B.shouldbe | C.mustbe | D.willbe |
A.maygo | B.mustgo | C.cango | D.musthavegone |
A.wouldbe | B.mustbe | C.usedtobe | D.couldbe |
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