根据首字母提示完成句子。

1. If a friend o_____ you cigarettes at a party, you can refuse.

2. It's h_____ for you to know a little about the illness.

3. We are looking for people who are k_____ about computer programs.

4. It's c_____ to speak to the old politely.

5. Most people are worried about the s_____ of the product.

如果在应用程序窗中通过菜单操作，将文件t1.txt另存为t2.txt，则（）。

A、t1.txt改名为t2.txt

B、原t1.txt不变，当前窗口内容以文件名t2.txt存盘

C、原t1.txt改名为t2.txt，当前窗口内容以文件名t1.txt存盘

D、当前窗口内容以文件名t1.txt存盘，同时再以文件名t2.txt存盘