介绍:
本节目由认真的狐狸（majimenafox）及【黑料学习】（insidelearning2）特别提供。可以通过以上微信号找到我哟。
They are supposed to be here by now.
【词组点睛】sb be supposed to do 应该...., 按理说应该.... = should
Teachers are supposed to treat all the students alike.
sth be supposed to do sth. 某事本应该发生（但是没有发生）
The train was supposed to arrive an hour ago.
I was not supposed to be angry about that.
【挑战】 我们应该将我们学到的东西应用到日常生活当中。（请使用sb be supposed to do 的结构）并 想象一下谁会在什么情况下说这句话呢？
2. I happened to have an extra copy.
【词组点睛】 happen to 刚好，恰好，毫无防备但是就是正好有嘛。
extra copy： copy复印文本，文本资料。extra copy 额外的，另外的，我有一份，而且还有一份多的（暗含了可以给你一份的意思）。
3. He probably just got holdup in the traffic.
【词组点睛】got holdup
got holdup in the traffic
【挑战】 想象一下谁会在什么情况下说这句话呢？
