When he heard the knock at the door, Frank probably thought ___________.
举一反三
- What did he do when he heard a knock at the doorHe______ he was answering a phone call from a client.
- How did Max feel when he heard someone knocking at the door?
- While he the letter, he heard a knock at the door.
- I heard someone _______ loudly at the door while I was listening to the radio. A: knock B: knocking C: to knock D: knocked
- Scarcely ____ asleep when a knock at the door awakened her.