This CD-ROM can help you learn and have fun ______.
A.a(chǎn)t timesB.on timeC.a(chǎn)t the same timeD.in time
C
詞義辨析。at times  有時(shí),偶爾;on time按時(shí),準(zhǔn)時(shí);at the same time同時(shí);in time及時(shí)。句意:這種光碟能幫助你學(xué)習(xí)同時(shí)又很有趣。所以選C。
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