题目内容
—Is Jack on duty today?
—It __________ be him. It’s his turn tomorrow.
—It __________ be him. It’s his turn tomorrow.
| A.mustn’t | B.won’t |
| C.can’t | D.needn’t |
C。
根据下文的It’s his turn tomorrow可知,Jack今天“不可能”(can’t)当班,故应选C。
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