There are so many viruses on the Internet. If ____ accidentally, the viruses ma

题干

There are so many viruses on the Internet. If ____ accidentally, the viruses may make
your computer break down.

A．downloading	B．to be downloaded
C．downloaded	D．being downloaded

上一题下一题 0.85难度单项选择更新时间:2010-05-13 05:13:06

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