33. I don't like going (hiking/ swimming/ trekking/ kayaking).
- This sentence expresses a personal preference about outdoor activities. The speaker doesn't enjoy one of the four activities mentioned.

34. In 10 years' time, I think people will wear (eco-friendly/ technology/ friendly/smart) clothes. These clothes will change color or shape when it's too hot or cold.
- This sentence expresses a prediction about the future of clothing technology. The speaker thinks that people will wear clothes that are either eco-friendly, technology-focused, friendly, or smart. Additionally, these clothes will have the ability to change color or shape based on temperature changes.

35. People (live/ are living/ lived/ will live) on Mars someday, but it is too expensive to travel there now.
- This sentence expresses a possibility about the future of human settlement on Mars. The speaker thinks that people may live on Mars in the future, but acknowledges that it is currently too expensive to travel there.

36. Nowadays, we can use some computers by touching their (smart walls /screens/printers)
- This sentence describes a current technological capability. The speaker is saying that some computers can be operated by touching their screens.

37. In 20 years from now, I think scientists might be able to print new human body parts using (3D printers/drones /homes)
- This sentence expresses a prediction about a future technological capability. The speaker thinks that in 20 years, scientists may be able to use 3D printers to print new human body parts.

38. I think technology (will/ won't/ is going to) make the world a better place.
- This sentence expresses an opinion about the impact of technology on the world. The speaker thinks that technology will either make the world a better place, it won't, or it is going to.

39. I always (reuse / pick up /throw away) the trash on the beach when I see it..
- This sentence expresses a personal habit or action. The speaker always reuses, picks up, or throws away trash on the beach when they see it.

40. (Playing/ Play /Don't play) football in the street because it's very dangerous.
- This sentence expresses a piece of advice or warning. The speaker advises against playing football in the street because it's dangerous.

41. I have (a/ the /an) dog. The dog is very intelligent.
- This sentence describes the speaker's ownership of a dog and the dog's intelligence. The speaker has a dog, and that dog is very intelligent.

42. Our soldiers fought very well against the (battle/ general /invaders) and saved our town. (warlare) a famous Vietnamese king.
- This sentence describes a historical event. The speaker is saying that their soldiers fought well against an enemy (not specified), and saved their town. Additionally, the speaker mentions "warlare," who is likely a famous Vietnamese king who was involved in this battle.