It's eight o'clock .The teacher is coming.Please ___ quiet.It's eight o'clock .The teacher is coming.Please ___ quiet.A./ B.be C.are

问题描述:

It's eight o'clock .The teacher is coming.Please ___ quiet.
It's eight o'clock .The teacher is coming.Please ___ quiet.A./ B.be C.are

B.please V+原形 something.表命令,请求.