steve used to be very quiet.he wasn't very o____

steve used to be very quiet.he wasn't very o____ Mike is no longer ____he used to be ,_____made us ver happy.A.what;which B.that;which C.who;as D.what;it Stan___Pat and Steve ____rather popular.(to gather)(to be) be used for be used to be used from区别 used to be used to be翻译 I used to be used to be to be used used to be to be used to be used be used to be used to used to be be used to used to／be used to／be used for的区别 be used for doing,be used to do,be used as,be used in,be used to doing,used to