2) The parents ought not to give their children whatever they want.

2. Teenagers 1) Teenagers ought to do more reading and watch less TV.

2) Teenagers ought not to go to sleep too late.

3. The government 1) The government ought to advocate saving water and electricity.

2) The government ought not to destroy cultural relics.

4. Teachers 1) Teachers ought to help the students both on study and on mentality.

2) Teachers ought not to scold the students without making things clear.

Step II Lead-in

Show the following pictures on the screen:

S: Wow! So many Santa Clauses!

T: Good, we all know that Santa Claus is a jolly, fat old man with a white beard and a red suit. But many years ago, there are many kinds of Santa Clauses in the world. Some of them wear green coats. Who knows how did the Santa Claus become what he likes today?

Ss: ... We don't know.

T: Today's Santa Claus is just an ad made by Coca Cola Corporation.

Ss: Ah? How and why?

T: The figure of the old man was painted by an artist from Chicago, and the color of his coat is just like the color of Coca Cola. From then on, the figure of this Santa Claus became well known and loved all over the world.

Ss: So, that's how it is!

T: So you see, ads not only can help to sell products, but also can make our life more