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1·She lost the key to the door.

她把房间的钥匙丢了。

2·This is not the key to the door.

这不是那扇门的钥匙。

3·I lost the key to the door.

我把门钥匙丢了。

4·I have mislaid my key to the door.

我不知道把门钥匙放到哪里了。

5·It's a key to the door.

这是那扇门的钥匙。

6·We've got to catch the key to the door!

我们必须上去逮住那扇门的钥匙！

7·It was the key to the door that they locked for yesterday.

昨天他们寻找的是房门的钥匙。

8·Tom hurried home only to find he lost the key to the door.

汤姆匆匆赶回家，结果发现自己忘记带钥匙。(进不了门)。

9·It was the key to the door that they were searching for yesterday.

昨天他们寻找的是房门的钥匙。

10·The interest is best teacher. It is the key to the door of knowledge.

兴趣是最好的老师，是开启知识大门的金钥匙。