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【题目】__________ the Internet is of great help, I don't think it's a good idea to spend too much time on it.

A. If B. While

C. Because D. As

【答案】B

【解析】句意:虽然因特网有大助益,但我认为在因特网上花费太多的时间不是一个好主意。while引导让步状语从句。

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