单选题— Is Jack on duty today?— It ______ be him, it’s his turn tomorrow.Amustn’tBwon’tCcan’tDneedn’t

单选题
— Is Jack on duty today?— It ______ be him, it’s his turn tomorrow.
A

mustn’t

B

won’t

C

can’t

D

needn’t


参考解析

解析:
考查情态动词辨析。句意:—今天是杰克之日吗?—今天不可能是他,明天才轮到他值日。由“it’s his turn tomorrow” 可知,今天不可能是他。can’t表示不可能的推测。

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