in my opinion,tips is very common in our life.when you get into hotel,you should give waiter tips.some peopele think that tips can encourage the service people to wirk better .what more,waiters will have a better level.every coin has two sides.the remaining people thing that spend more money.what's worse,it will cause bad custom,it will do harm to our life.
in my opinion,we should make full use of tips to make contribution to this society