您要查找的是不是：
- Somebody knocked at the door, didn't they? 有人敲门了,是不是?
- I think somebody knocked at the door; I will go and see. 我觉得有人敲门，我去看看。
- The teacher was about to begin class when somebody knocked at the door. 老师正要开始上课，这时有人敲门。
- When somebody knocked at the door,he got the wind up,thinking it was the police. 一有人敲门，他就惊慌起来，以为是警察来了。
- When somebody knocked at the door and asked if Mr Philportts was in, Jo got the wind up. He thought it was the police. 当有人敲门问起菲尔波茨是否在家的时候,乔总要受惊,以为来人是警察。
- When somebody knocked at the door and asked if Mr. Marcus was in, John got the wind up. He though it was the police! 当有人敲门问马库斯是否在家里，约翰吓了一大跳，他以为是警察来了!
- Do you hear somebody knocking at the door? 你听到有人在敲门吗?
- We heard somebody knocking at the door. 我们听到有人在敲门。
- Listen! I heard somebody knocking at the door. 听!我听到有人敲门。
- Somebody knocked at the door. 门口有人敲门。
- I knocked at the door but no one answered. 我敲了门,但无人应答。
- There was a furious knock at the door. 有人在猛烈地敲门。
- She ran to the place and knocked at the door. 她跑到那里，敲了敲门。
- He knocked at the door before coming in. 他进去之前先敲了敲门。
- When he knocked at the door I was cooking . 当他敲门时，我正在做饭。
- He took a deep breath and knocked at the door. 他深吸了一口气，敲了敲门。
- He knocked at the door and entered. 他敲了敲门便走进去了。
- Did you hear the knocks at the door? 你听到敲门声了吗？
- He went up to a house and knocked at the door. 他来到一幢房子的门前,敲了敲门。
- He went upstairs and knocked at the door. 他上楼敲了敲门。
