问题: 三、选择
28、--Your teacher must be in his office, _____ he?
--No,he _____ be.
A.needn't...needn't
B.mustn't...needn't
C.mustn't...can't
D.needn't...mustn't
解答:
28、--Your teacher must be in his office, __C___ he?
--No,he _____ be.
A.needn't...needn't
B.mustn't...needn't
C.mustn't...can't
D.needn't...mustn't
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