– Tom, it's too late. Our son ________ be back.– Don't be anxious. I dare say he ________ have some extra work to do.

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1. – Tom, it's too late. Our son ________ be back.
– Don't be anxious. I dare say he ________ have some extra work to do.

A . must，must B . should ，should C . should ，must D . must ，should

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高考英语复习专题试卷——情态动词