题目内容：

A．阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Mary: Do you use an anti-virus program 1.________ (protect) your computer?

Mike: Yes. Because here are so many bad things on the Internet and so many people 2.________ are trying to use the Internet to hurt other users. You have to be very careful and keep your computer clean.

Mary: How often do you run your anti-virus program?

Mike: I usually run it every five days.

Mary: Oh, my new computer 3.________ (attack) several times so far. Would you like to suggest an anti-virus program for me?

Mike: How about trying this one? It’s very good and you can download it4.________ free.

Mary: That 5._______ (sound) very good. Which website should I visit to download it?

Mike: Just a minute ... go to this one. 6.________ only takes a few minutes to download it. Then you have to go through the set-up procedures.

Mary: What do you use your computer for?

Mike: Surfing the net and word processing (文字处理). I also do a lot of work with photographs.

Mary: Photographs? You’re a really 7.________ (intelligence) person.

Mike: No doubt 8.___it is easy to learn a computer program and you can edit and resize photographs.

Mary: Computers are great in 9. ________ way, aren’t they? I should download some programs and learn 10._______ to use them.