重点讲解：
1. get up
起床；
eg. We will get up early and do some housework.
我们将早起并且做点家务。
eg. He was pleased to get up to the singing of birds.
他很高兴起床听到鸟的歌唱。
2. open up
开…的门；
eg. Three armed men were waiting when the postmaster and his wife arrived to open up the shop.
当邮政局长和妻子到邮局开门营业时，3名持械男子正等着他们。
eg. Open up, or I break in!
把门打开，不然我要砸门了！
3. fire up
开动，发动（机器）；
eg. Put on a helmet, fire up your engine and head out on the open road.
戴上头盔，发动引擎，开上乡村干道。
eg. We had better fire up the furnace.
我们最好把炉子生起来。
