I hear someone knocking at the door.Please go and see who ____is.A.it B.he?

Listen!I hear someone knocking at the door.Listen!_____ ______ a knock on the door. can you hear someone _____(knock) on the door now WHEN I WAS READING I HEARD SOMEONE -----(KNOCK)AT THE DOOR为什么WHEN后加ING不是在I HEAR后加吗/告诉我规律括号里的也要填!谢谢! 短文改错 It was quiet late at night.I was reading a newspaper in my room when i hear someone knock What did you hear last night? I seemed someone knock at the door.A hearB.to have heardC.to hearD.having heard i think someone is in .let's knock the door 这句话的knock为什么要改成knock at If you someone,you should say “I’m sorry”.A.knock at B.knock over C.knock into D.knock out的答案是什么 为什么 Did you hear someone[ ] 【knock】 at the door when you[ ]【 watch】 TV last night.填什么,为什么 Do you hear someone knock at the door? 怎么理解?怎么全是现在时?错了吗? Listen,l hear someone knocking at the door的同义句Listen,____ _____ a knock on the door When I was doing my homework ,I heard someone (knock) at the door. While I ------(cross) the street,I ------(hear) someone -----(call) me. I heard someone _____(knock /knocking) at the door just now .横线上应填什么?为什么 i __(read) a history book when someone __(knock) at the door I think someone is in.Let's knock the door.改错 I think someone is in . Let's knock the door. 改错 找错:Listen!I hear someone open the door. I hear someone is crying.变为同义句.I hear ____ ____.