please be quiet in class中be 的作用

please be ______(quiet) in the library please be quiet.you must sit in the classroom( )A.quiet B.quietly C.loud D.loud our teacher is coming.please()A.quiet B.be quiet C.to be quiet don't ___ in class,Please be quiet .A.talk B.speak C.say please be quiet ,she said in a low ( )a sound b voice c noise d whisper Please be quiet in our library and read (quiet)Please be quiet in the library and read (quiet)这个(quiet)怎么变?加不加ly? please be quiet in class中be 的作用 Billy,please be quiet. Please be quiet 是什么意思? And please be quiet. Silence,please!Please be quiet! PLEASE _____(BE) QUIET WHEN WE ARE IN SCHOOL BUILDINGS 连词成句 library,be,the,please,quiet,in Don't ____ in class ,please be quiet. Please (be) quiet in class.中间填什么? 连词成句 libeary,be,the,please,quiet,in Please _____ quiet ,children.A.are B.is C.be Please be quiet in our library 此句中文和quiet是形容词吗?