重点讲解：
1. used to do sth. 过去常常；过去曾；
例句："It's not always good policy to tell people exactly what's on you mind, " I used to caution her.
“有什么就说什么不一定总是个明智的行为rIcos5=&gqT);+。”我过去曾警告她|Chek|,p6pAFeCO~_a。
2. at the end 最后；
例句：You will have the chance to ask questions at the end.
最后你会有提问的机会R;G#mco0V%lcRs6[-E。
3. fall asleep 入睡；睡着；进入梦乡；
例句：It took me half an hour to fall asleep last night.
昨天夜里我花了半个小时才入睡HKPM]_,gr~.71*E。
4. wake up 醒；醒来；唤醒；弄醒；
例句：I nearly always wake up fresh and rested.
我几乎每天醒来都精神抖擞，得到了充分休息rCi2j2fxf&vRO。