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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
参考答案
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。
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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