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求解答过程:—Isenthimthedic—Isenthimthedictionarybymailthismorning.—Youthat,forhe'scomingtomorrowmorning.[]A.needn'thavedoneB.didn'thavetodoC.needn'tdoD.mustn'tdo

题目详情
求解答过程:—I sent him the dic
—I sent him the dictionary by mail this morning.
—You ______ that, for he's coming tomorrow morning.
[     ]
A. needn't have done  
B. didn't have to do  
C. needn't do        
D. mustn't do

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答案和解析
A