三、根据中文提示完成句子。
1. 二十年前，人们付现金。现在他们用智能手机支付。
Twenty years ago, people paid in . Now they pay on their .
2. 别担心。机器人会帮你的。
. The robot will help you.
3. 我们离开房间时应该关灯。
We should the lights when we leave the room.
4. 多么聪明的机器人啊！
a robot!
5. 过去人们写信。现在他们网上聊天。
In the past, people letters. Now they online.

1. cash; smartphones 2. Don't worry 3. turn off 4. What; clever/smart 5. wrote; chat

四、从Ⅱ栏中选出与Ⅰ栏相对应的答语。
（一）
Ⅰ
（）1. What will you do for Earth Day?
（）2. When did your parents buy the robot?
（）3. How did you make this bag?
（）4. How did you go to Beijing in the past?
（）5. Did you take part in Earth Hour?
Ⅱ
A. Two weeks ago.
B. Yes, I did. I turned off the lights.
C. I'll make a poster.
D. I took a slow bus.
E. I made it with old jeans.

(一) 1. C 2. A 3. E 4. D 5. B

（二）
Ⅰ
（）1. What a beautiful picture!
（）2. Can the robot play chess?
（）3. Why did you throw away the box?
（）4. How often do you visit your grandparents?
（）5. Where did you put the poster?
Ⅱ
A. At the school gate.
B. Because it was broken.
C. Yes, it can. It's very smart.
D. Once a week.
E. Thank you. I made it with old buttons.

(二) 1. E 2. C 3. B 4. D 5. A

五、从方框中选择合适的句子完成对话(有一项多余)。
（一）
A. Yes, I will.
B. Let's play with it together.
C. That sounds great!
D. What a cool robot!
E. What can it do?
F. When did you buy it?
Mike: Look at this robot!
Mike: 2.
Mike: 3.
Mike: Will you play with it?
Mike: 5.
Su Hai: 1.
Su Hai: It can cook and clean.
Su Hai: Two weeks ago.
Su Hai: 4. Let's play with it.
（二）
A. What's it made of?
B. I'll make a poster.
C. That's a great idea!
D. Let's sort the rubbish together.
E. We can put rubbish in it.
F. Can I join you?
Liu Tao: What will you do for Earth Day?
Liu Tao: 2.
Liu Tao: How can we use this old box?
Liu Tao: 4.
Liu Tao: 5.
Yang Ling: 1.
Yang Ling: Sure.
Yang Ling: 3.
Yang Ling: Good idea. Let's do it now.

(一) 1. D 2. E 3. F 4. A 5. C (二) 1. B 2. F 3. E 4. D 5. C