根据汉语提示，完成句子。

1. My mother is ill. I am ______ ______ (担心) her.

2. The room is ______ ______ (挤满) people.

3. That sounds very good. I ______ ______ (赞同) you.

4. Running is a good way to ______ ______ (保持健康).

5. He doesn't get enough sleep. So he ______ _____ (看起来疲劳).