A.need | B.could | C.may | D.can |
A.should | B.must | C.could | D.would |
A.can | B.should | C.would | D.must |
A.can’t | B.mustn’t | C.shouldn’t | D.needn’t |
A.might | B.need | C.can | D.must |
A.be called off | B.was called off | C.to be called off | D.should call off |
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