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1·It was careless of me to leave the door open.

怪我粗心忘了关门。《牛津词典》

2·It was careless of my little brother to leave the door open when he went to the cinema last night.

昨晚我弟弟去看电影的时候没关门，他太粗心了。

3·Leave the door open, please.

请把门开着吧。

4·Shall I leave the door open?

我让门开着，好吗？

5·They always leave the door open.

他们一直把门开着。

6·Please leave the door open.

请让窗子开着。

7·You'd better leave the door open.

你最好让门开着。

8·Please leave the door open.

请不要关门。

9·Leave the door open until step 7.

在执行步骤7之前一直保持门打开。

10·Leave the door open when you go out.

当你出去时，不要关门。