He knocked at the door and entered.

他敲了敲门便走进去了。

She is pecking away at the keys of a typewriter.

她不停地敲打着打字机的键。

knock at my window at eight o'clock and I'll be ready.

8点钟敲我的窗，我会准备好的。

There was a light knock at the door.

有人在轻轻地敲门。

They heard a knock at the front door.

他们听到前门有人敲门。

It'sounds as though there is a knock at the door.

听起来好像有人在敲门.

He was scarcely awake when he heard the knock at the door.

他刚醒来就听见有人敲门.

There was a treble knock at the door.

门上响起了三声敲门声.

There had been a knock at the door and when she opened it she locked herself out.

外面有敲门声，她去开门，结果把自己反锁在了外面。

Just as breakfast was completed there was a knock at the door.

早饭刚吃完,就有人来敲门.

There was a very quiet knock at the door.

有人轻声叩门.

They both heard a knock at the side - door.

他们俩都听见有人敲侧门.

Did I hear a knock at the door?

是有人敲门 吗 ?

There was a knock at the door. Someone had come looking for me.

门外又敲门了, 找我的.

I was preparing for bed when I heard a knock at the door.

我正准备睡觉时听到有人敲门.

The global economy has taken a serious knock, at huge human cost.

全球经济遭受了严重的打击, 人们为此付出了巨大代价.

She hid the gift immediately she heard the knock at the door.

一听见敲门声她就把礼物藏了起来.

• knock at an open door多此一举