A.needn""t have come to | B.needn""t come to | C.didn""t have to | D.don""t need to come to |
A.May ; mayn""t | B.May ; can""t | C.Must ; mustn""t | D.Need ; must |
A.Yes , I won""t | B.No , I won""t | C.No , I""ll | D.Yes , I will |
A.wait | B.will wait | C.shall wait | D.waited |
A.can | B.may | C.shall | D.will |
A.should have failed | B.couldn’t have failed |
C.might have failed | D.mustn’t have failed |
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