He may come.but I'm not sure that.A. about B. on C. with D. to 题目和参考答案——青夏教育精英家教网—

题目内容

He may come，but I'm not sure ______ that.

A. about B. on C. with D. to

【解析】

试题分析：about，关于；on，在……上面；with，带有，伴随；to，到，向。句意：他可能来，但是关于那件事我不太确定。Be sure about，确信某事，故选A。

考点：介词辨析

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