1. Unit 3 Teenagers should be allowed to choose their own clothes.

2. get her ears pierced 穿耳 wear earring 戴耳环 drive 驾驶 driver 驾驶员，司机 driver’s license 驾驶证 buy/choose your own clothes 买／选自己的衣服

3. The little boy cleaned the room last night. The black cat eats a fish every day. Parents should allow fifteen-year-olds to choose their own clothes. The room was cleaned by the little boy last night. A fish is eaten by the black cat every day. Fifteen-year-olds should be allowed to choose their own clothes by their parents.

4. grammar  构成 : be+ 动词的过去分词。 (be 动词有人称、时态和数的变化。 )  含有情态动词的被动语态： 情态动词＋ be ＋动词的过去分词。

5.  The telephone ___________(invent) by Bell in 1876.  The trees may ____________(plant) in spring.  Teenagers should not ____________(allow) to drive.  English ___________(speak) in Canada.  Math must ___________ (study) well.  The teacher should allow Anna to finish the picture. _____________________________________.

6. Free talk: school rules What should teenagers allowed to do at school ? Why and why not?