题目内容

This CD-ROM can help you learn and have fun ______.
A．at timesB．on timeC．at the same timeD．in time
C
词义辨析。at times  有时，偶尔；on time按时，准时；at the same time同时；in time及时。句意：这种光碟能帮助你学习同时又很有趣。所以选C。
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