33. I don't like going (hiking/ swimming/ trekking/ kayaking). 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. 35. People (live/ are living/ lived/ will live) on Mars someday, but it is too expensive to travel there now. 36. Nowadays, we can use some computers by touching their (smart walls /screens/printers) 37. In 20 years from now, I think scientists might be able to print new human body parts using (3D printers/drones /homes) 38. I think technology (will/ won't/ is going to) make the world a better place. 39. I always (reuse / pick up /throw away) the trash on the beach when I see it.. 40. (Playing/ Play /Don't play) football in the street because it's very dangerous. 41. I have (a/ the /an) dog. The dog is very intelligent. 42. Our soldiers fought very well against the (battle/ general /invaders) and saved our town. (warlare) a famous Vietnamese king.