用括号内所给词的适当形式填空。

1. He's really _______ (tiring). He has been working all day.  

2. She was _______ (bad) injured in the accident.  

3. He made several _______ (help) suggcstions.  

4. I think she can make a decision for _______ (she) because she isn't a child anymore.  

5. You should be a bit more _______ (confidencc) in yourself.  

6. I would rather _______ (read) English than _______ (write) words.  

7. Put the _______ (burn) area under cold _______ (run) water.  

8. The plane arrived _______ (safe) this morning.  

9. She is a very popular girl. She has millions of _______ (listen).  

10. Mr Li is a _______ (knowledge) teacher.  He almost knows all.

单井采气流程一般安装有（）和放空阀，确保采气安全。

A、安全阀

B、球阀

C、闸阀

D、节流阀