5．Tony sometimes writes ________ his friend.

4．I always do the housework ________ the weekend.

3．Bruce doesn't have a computer ________ home.

2．Mr Li likes to write novels ________ the computer.

1．I usually download some music ________ the Internet.

10．Do they often use the Internet to send emails and(photo)?

B．根据句意用适当的介词填空

9．September is the ________ (nine)month of the year.

8．I don't know how ________ (download)music from the Internet.

7．Tony ________ (not visit)his grandparents, but he often sends emails.

6．Many ________ (visit)come to Beijing every year.