—Someone is knocking at the door. —Yes, I’ll go and see who it is.为什么用 it 呢?

Someone is knocking at the door.____ is it? someone is knocking at the door.It might be the posyman.为什么用is knocking 单句改错：listen!someone is knocking the door 英语翻译sorry，是Someone is knocking _____ ______ the door. Someone is knocking at the door,but who can____ be? listen! someone is knocking _ the window填什么 There is someone knocking at the door.为什么用“knocking”,要加“ing”? —Someone is knocking at the door. —Yes, I’ll go and see who it is.为什么用 it 呢? Someone is knocking at the door.同义句改写：There is ___ ___ at the door. someone is knocking at the door.who [ ]it be?A;mustB;canCmayD;shall必须有理由 There is someone knocking at the door.It may ________ (be) the postman.如题 someone is knocking at the door.___must be Tom.为什么用he而不用it? someone is knocking on the door.who can____ beA that Bthis Cthe Dit someone is knocking at the door,____ _____?如何变反义疑问句为什么 arent they Someone is knocking at the door._must be TomSomeone is knocking at the door._must be Tom A.that B.It C.He D.This “Someone is knocking at the door,please( )it”he said to me.A close B answer C look D see这题的意思是?knocking是什么意识? Someone is knocking on the door （同意句）改成There is ___ ____ ___ the door 说明理由1.— Someone is knocking at thedoor.Is it Ann?— It _____ be her.She is giving a performance at thetheatre now.A.may B.must C.can’t D.mustn’t