重点讲解：
1. look back 追忆；回顾；
例句：Looking back, I am staggered how easily it was all arranged.
回头一想，我惊异地发现这一切的安排竟是如此简单。
2. take out 去除；把…带出去；
例句：My neighbor took out the burnable trash.
我的邻居把可燃垃圾拿到外面去了。
3. clean up 打扫；清扫；把…弄干净；
例句：She is cleaning up the kitchen now.
她现在正在打扫厨房。
4. occur to （想法或主意）被想到，被想起，浮现于脑海中；
例句：It occurred to me that I could have the book sent to me.
我想到可以让人把书寄给我。
5. to be honest 老实说；说实在的；
例句：To be honest, I find it unsatisfactory.
说实话，我很不满意。
6. even if 即使；尽管；纵然；
例句：We shouldn't slight anybody even if he's a nobody.
我们不应该轻视任何人，即使他是一个小人物。
7. as soon as 一…就…；
例句：The stars came out as soon as darkness fell.
天一黑，星星就出来了。
8. take over 接收，接管；
例句：My idea is letting her take over my work.
我的想法是让她接替我的工作。
