(一) Important words and phrases：shake, kiss, bow, greet, custom, land, relaxed, towards, shake hands, drop by, after all
(二) Important sentences: 1) What are you supposed to do when you meet someone? You’re supposed to kiss. You’re not supposed to shake hands.2) When were you supposed to arrive? I was supposed to arrived at 7:00. 3) You should have asked what you were supposed to wear?
