A.may | B.can | C.must | D.will |
A.is | B.can’t be | C.could be | D.will be |
A.can ; can; must | B.must; must; can |
C.can; must; must | D.can; must; can |
A.need | B.can | C.must | D.would |
A.must | B.mustn’t | C.should | D.shouldn’t |
A.need | B.can | C.should | D.must |
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