Listen!Someone____________(knock)atthedoor.
举一反三
- A: Listen! There__________ someone __________ at the door.B: It must be your sister. A: is; knocking B: is; knock C: are; knocking D: are; knock
- I ___________ (listen) to the music when someone __________ (knock) at the door half an hour ago.
- Suddenly he heard someone（）gently on the window. A: knock B: knocking C: knocked D: to knock
- There was a knock at the door. It was the second time someone ( )me that evening.
- I heard someone _______ loudly at the door while I was listening to the radio. A: knock B: knocking C: to knock D: knocked