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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1399
题文

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
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TherearesomanyvirusesontheInte