重点讲解：
1. be about to do sth.
即将（做…）的；快要（发生…）的；
eg. As she was about to speak, I frowned her down.
她刚要开口，我就皱皱眉示意她别出声。
eg. He was under pressure to resign and was about to be sidelined.
他承受着被迫辞职的压力，很快就要被排挤出去了。
2. lock up
锁好（建筑物或汽车的）门窗；
eg. Don't forget to lock up.
别忘了锁好门窗。
eg. Leave your car here and lock it up.
把车停在这里锁好。
3. close up
（通常因离开）关上，关闭；
eg. Just close up the shop.
把店关了就好了。
eg. The summer house had been closed up all year.
这座消夏别墅关了整整一年。
4. wipe off
擦去；擦掉；揩干；
eg. She applied a little lipstick, wiped it off, but it left a pink tinge.
她抹了一点口红，又擦掉了，但却留下了一丝粉红色。
eg. He used his sleeve to wipe the con-densation off the glass.
他用袖子擦掉玻璃上凝结的水珠。