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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科目：初中英語 來源：同步題 題型：單選題

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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