21. I want your ______, sir. I don’t know what to do with it.
A. advices B. piece of advices C. advice D. two advices
22. Our English teacher is ill, and we are all ______ her health.
A. concerned about B. careful of C. grateful for D. calm down
23. My mother asked me ______.
A. what does he want B. what he wants C. what did he want D. what he wanted
