Be quiet ,please .The teachers ____ (have) a meeting .

Billy,please be quiet. Please be quiet 是什么意思? And please be quiet. Silence,please!Please be quiet! WILL YOU PLEASE BE QUIET PLEASE怎么样 please be quiet 改为否定句 ______ ______ quiet ,please. Please be quiet (改成否定句) Please _____ ______ quiet. please be quiet 与 please keep quiet 区别是什么 Don't be l___.please be quiet Please be quiet. (改为同义句) _______ ________ quiet be quiet的同义句,（ ）（ ）quiet,please. be quiet的同义句,（ ）（ ）quiet,please. please be quiet.变否定句.为什么? so please be very quiet 的意思 please be ______(quiet) in the library Please be quiet!The other ( ) hear very! Be quiet,please!___改为—— Please be quiet.请.中文意思