Ответ:
1.Do you know how to use Internet?
2.Which web sites do you use often?
3.She downloaded neccesary files last week.
4.I didnt install the antivirus yesterday.
5.My mother asked me what i was pasting and coping from the Net.
6.I had sent an email is the boy asked her.
7.His brother told him to stop downloading those films.
8. Jamil said that his computer wasnt functioning well.