who was knocking at the door just now?还是who knocked at the door just now?

who was knocking at the door just now?还是who knocked at the door just now? he stopped to see who was knocking at the door 是seeing还是to see? 为什么是is knocking：Who is knocking(knock) at the door?it's me. Someone is knocking at the door,but who can____ be? 单句改错 who is the men knocking at the door someone is knocking at the door.who [ ]it be?A;mustB;canCmayD;shall必须有理由 -Who's knocking at the door?- ____ me Tom.It's That's哪个呢? There is__(nobody,somebody.anybody,everybody)knocking at the door,Go and see who it is who is knocking at the door?A.This is me knockingB.It's me. who is knocking at the door?it is ()me还是i呢?求理由 1.Jonathan asked Pete a question “Will you come tomorrow?”（间接引语）____________________________________________________________________________________2.I don’t know who was knocking at the door.I dare not open the door.（用分词连 who is knocking at the door?i suppose------must be bob.A.the one B.it C.who D.he jusy as we were leaving ,the postman (knocked/was knocking) at the door It was almost midnight ( ) she heard someone ( ) at the doorA when,knocking B that ,knocked C when ,knock D that ,knocking Someone_________ at the door when she was cooking in the kitchen应该填knocked还是was knocking? Someone is knocking at the door,but who can____ be?A.one B.he C.she D.it 6.There is someone knocking at the door,who _____ it be?A.can B.may C.must D.need 一道英语填词题There is someone knocking at the door.Please go and see who （ ）（是谁）