Be careful when you surf the Internet.If
题型:选择题
问题:
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
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