Be careful when you surf the Internet．If you download a virus into your computer
题型：不详难度：来源：
Be careful when you surf the Internet．If you download a virus into your computer ______, you will not open your files．| A．on purpose | B．by accident | C．at random | D．on average |
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答案
| B |
解析
| 词组辨析题。上网时小心些，如果你偶然下载病毒进入你的电脑你的文件会无法打开。A．on purpose 故意 B．by accident 偶然 C．at random 随机 D．on average 平均 根据语境选B |
举一反三
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