练习册

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    This CD-ROM is quite useful. It can help us learn English and geography . A. at times B. at this time C. at the same time D. by the time 【查看更多】

     

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    This CD-Rom is quite useful. It can help us learn English and geography _____.
    [     ]
    A. at times
    B. at this time
    C. at the same time
    D. by the time

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