第五节根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Mother: Are you going shopping with me today?

Father: No,   61 

Mother: Are you OK?

Father:   62  I am just thinking of painting the door.

Mother:   63 

Father: No, I am going to paint them white. That will match the wall.

Mother: You are right. But that’s a lot of work.   64 

Father: Yes, I think so. I can hardly do it by myself.

Mother:   65 

Father: It is very kind of you.

A．Yes, I am quite all right.

B．Are you sure of that?

C．I don’t feel like going out today.

D．That will be fine.E. Do you need a hand？

F. Are you going to paint them green?

G. I’d be glad to be of help.

计算机病毒的预防措施有（）。

A.计算机系统的启动尽量使用硬盘引导系统

B.对新购置的计算机硬件、软件系统进行测试

C.为每个人分配不同的用户权限

D.不要随便打电子邮件中的附件文件，不要随意下载软件