问题 选择题

Mother: Bob is sure ___ tonigh.

Father: Don't be so sure ___ it.

A.to come ; about

B.to come; of

C.will come; for

D.coming; with

答案

答案:B

be sure to do sth. 一定, 必然; be sure of/ about…确信, 有把握.

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单项选择题