五、从方框中选择合适的单词或短语补全句子。（有一项多余）
A. high-speed trains B. chat online C. turn off D. made of E. pick up F. wrote
1. In the past, my grandpa letters to his friends.
2. Now we can with friends on the internet.
3. We should the lights when we leave a room.
4. This bag is old jeans. It looks very cool.
5. Let's go plogging and rubbish in the park.

1. F 2. B 3. C 4. D 5. E

六、根据中文、图片或首字母提示完成句子。
1. Twenty years ago, people paid in c. Now they use smartphones.
2. The robot is very s(聪明). It can do many things.
3. We made a p for Earth Day.
4. The cardboard box went into a m and became a new book.
5. Don't w food. Eat up all the rice and vegetables.
6. In the past, people wrote l to friends.
7. We should s the rubbish before we throw it away.
8. H-s trains travel very fast.
9. My grandma often c with me on the smartphone.
10. The robot can help us do (家务). It cooks and cleans.

1. cash 2. smart 3. poster 4. machine 5. waste 6. letters 7. sort 8. High-speed 9. chats 10. housework

七、用所给词的适当形式填空。
1. Last week, I (make) a toy car with a cardboard box.
2. My grandma often (chat) with me on the smartphone now.
3. There (be) many changes in our life in the past ten years.
4. Look! The robot (cook) dinner for us. It smells good.
5. We should (not waste) food. Eat up all the rice and vegetables.
6. In the past, people (write) letters. Now they (send) emails.
7. What a (wonder) change! The box became a new book.
8. My father (buy) a robot from the shop two weeks ago.
9. The Earth is our home. We (should) protect it.
10. (not worry). The robot can help you stand up.

1. made 2. chats 3. were 4. is cooking 5. not waste 6. wrote; send 7. wonderful 8. bought 9. should 10. Don't worry