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- Who is it to knock at the door on earth? 到底是谁在敲门?
- Someone was heard to knock at the door three times. 只听见有人敲了三次门。
- She wanted to knock at the door to make her son wake up. 她想通过敲门叫醒她的儿子。
- He wondered if it was proper to knock at the door of her room. 他不知道敲她的房门是否合适。
- There was a furious knock at the door. 有人在猛烈地敲门。
- There seems to be a knock at the door. 似乎有人在敲门。
- I've told Paul several times to knock at the door before coming in! but he's forgetting things all the time. 好多次我告诉保罗进屋前敲门，他总忘。
- I seem to hear someone knocking at the door. 我好像听到有人在敲门。
- I was wakened by a knock at the door. 敲门声把我吵醒了。
- Did you hear the knocks at the door? 你听到敲门声了吗？
- In the screen of the monitor, the man with thermos goes back to the door, vigilantly looks around, and stretches out a hand to knock at the door. 监视器的画面上，拎热水瓶的男子回到房间门口，警惕地四下看看，伸手敲门。
- There comes a knock at the door. 传来了敲门声。
- There was a very quiet knock at the door. 有人轻声叩门。
- Do you hear someone knock at the door? 你听见有人敲门了吗?
- She ran to the place and knocked at the door. 她跑到那里，敲了敲门。
- Just at that moment there was a knock at the door. 就在那时,有人敲门。
- He felt someone knock at the door. 他感到有人敲了一下门。
- I knocked at the door but no one answered. 我敲了门,但无人应答。
- I heard someone knock at the door three times. 我听见有人敲了三次门。
- Someone is knocking at the door. 有人在敲门。
