问题
选择题
_____ 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
答案：B
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_____ 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