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Be sure __________ when you have time.

时间:2022-06-13 20:47:06

Be sure __________ when you have time.

A.of coming

B.about coming

C.to come

D.coming

答案及解析: C

解析:

be sure of/about sth. 对……确信/有把握;

be sure to do sth.表示一种期望、要求,意思为“务必……”“一定……”。

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