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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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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