一、默写单词。
1. 抛，扔
2. (某些水果和蔬菜的)皮，壳
3. 将，将要
4. 地，地面
5. 突然倒下，跌倒

1. throw 2. skin 3. will
4. ground 5. fall

二、默写短语。
1. 使街道变脏

2. 摔下来

3. 一个垃圾桶

4. 使我们的城市保持干净

5. 走回家

6. 一块香蕉皮

7. 在地上

8. 把它捡起来

1. make the street dirty 2. fall down 3. a rubbish bin 4. keep our city clean 5. walk home 6. a banana skin 7. on the ground 8. pick it up

三、连词成句。
1. shouldn't, do, you, Bobby, that (, !)

2. a, throws, Bobby, on, skin, banana, ground, the (.)

3. happy, to, Billy's, see, is, mum, them (.)

1. Bobby, you shouldn't do that!
2. Bobby throws a banana skin on the ground. 3. Billy's mum is happy to see them.

四、根据课文内容，补全短文。
Bobby and Tina walk home. They like their clean and beautiful .
Bobby a on the ground. Tina says, “Bobby, you shouldn't do that! It makes the street .” Bobby says sorry, but it's too late. Billy . Bobby helps Billy . Tina the . Bobby and Tina Billy . Billy's mum is to see them. She wants to give some bananas to the children, but Billy says no.

city; throws; banana skin; dirty; falls down; up; cleans; street; walk home; happy