$VII.$
1. A. normal
→ normal: bình thường.
2. D. do the gardening
→ do the gardening: làm vườn.
3. C. to describe the things a robot can do.
→ Dẫn chứng: Some robots are used to clean things. These robots can help vacuum your house. Some robots can even recognize words. They can be used to help answer telephone calls.
4. D. to help explore Mars
→ Or they will do things that we don’t want to do: Chúng sẽ làm những việc mà chúng ta không thể làm được.
5. B. Robots are helpful.
→ Robots are dangerous: Robot rất hữu ích.
$VIII.$
1. I could play chess when I was six.
2. They couldn't play football because it rained heavily.
3. She could not understand anything I said.
4. Could you speak English when you were five?
5. My brother could draw pictures when he was two.
6. Could robots can clean the house ten years ago?
7. This suitcase was very heavy so I couldn't lift it.
8. Dave could play tennis very well when he was young.