北京东城区示范校2011届高三综合练习(二) computers are convenient to us in daily life, it may also cause other problems. A. Whether B. Because C. As D. While 题目和参考答案——青夏教育精英家教网—

北京东城区示范校2011届高三综合练习（二）

_____ computers are convenient to us in daily life, it may also cause other problems.

A. Whether B. Because C. As D. While

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