重点讲解：
1. be made out of
用…（制成）；由…（建成）；
例句：Many items in daily use are made out of plastic.
有很多日常生活用品是塑料制的0-YjCY.VVgbH*%MwAV,Y。
2. be supposed to do sth.
认为；觉得；相信；
例句：He is commonly supposed to be foolish.
他是公认的傻瓜OFgYzx].dfmUJ%sZoo。
3. think back
回忆；回想；
例句：Even now I don't like to think about it.
就算是现在我也不愿回想起我的童年H*mF#;Sun_8r。
4. to tell the truth
说实在的；坦白说；
例句：To tell the truth, this is all Greek to me.
说实话,我对此一窍不通otmC+txu9+s.8^NObTW。
5. in case
以备；以防；免得；
例句：We allowed a margin of twenty minutes in case the bus was late.
我们预留二十分钟宽裕时间，以防汽车晚点QWwM,h[KH~*。