根据句意及首字母提示补全单词，使句子完整正确。

1. Bob is a quiet boy. He feels nervous to speak in p_________ .  

2. I have a bad cold and I c_________ a lot.  

3. Don't b_________  the school rules when you are in the school.  

4. Who is the w_________  of the writing contest?  

5. My teacher e_________ me not to give up studying English.

营气的生理功能是（）

A.化生血液

B.推动生长发育

C.助肺呼吸

D.护卫肌表

E.营养全身