注意：出现Miss Start，上次课讲的东西一定要听，在这部分很可能出细节题
Miss Start 信号词：Before we get started, let’s review what we’ve learned last class…
Let’s pick up where we left off last week, OK, as you recall(记得)…
Before we begin our discussion on…(此处为本次主题)，Let’s review what we know about…(此处为上次主题)
间接开头： In your text book, the author says that… (主题出现)，I thought we all to/should take sometime to talk about it. (不一定完全一样，但是类型差不多)
