离开前请确保关闭电脑。

Make sure you ___shut ___down your computer before you leave.

机组人员关闭了飞机的右引擎。

The crew ___shut ___down the right-hand engine of the aircraft.

我关闭了电脑，然后打电话给我妈妈告诉她这个好消息。

I ___shut ___down the computer and called my mum to tell her about the good news.