重点讲解：
1. used to do sth. 过去常常；过去曾；
例句：There used to be public executions.
处决囚犯过去都是公开执行的+P7QhSwJH9DtYR.r。
2. find out (尤指特意通过努力)发现，找出，查明；
例句：Attendance has dropped off,we shall find out why.
观众减少了，我们应找出原因来ThR8&hE-%X9。
3. pop up 突然出现；不意冒出；
例句：The menu pops up when you click twice on the mouse.
双击鼠标，菜单便会弹出来JUXf!twA~|,(ArM9r-。
4. draw in 使参与；使卷入；
例句：It's stupid trying to draw in customer with prize and gift!
想用奖品和礼品引来顾客是愚蠢的事！
5. end up 最终；结果；到头来；
例句：Don't gobble the turkey. You'll just end up getting stuffed.
别狼吞虎咽地吃火鸡，你最后会噎着的2b[0;9N]+q1W。