24. Which of the following is closest in meaning to the word "join"?
Answer: A. take part in

25. She/ have/ opportunity/ study/ Australia/ last year.
Answer: D. She had an opportunity to study in Australia last year.

26. While/ she/ clean/ the house/ her husband/ water trees/ in the garden.
Answer: C. While she was cleaning the house, her husband was watering trees in the garden.

27. "Do you often do your homework when you have free time, Nam?" said Hoa.
Answer: D. Hoa asked Nam whether he often did his homework when he had free time.

28. Join environment projects more often, and we can help save the Earth.
Answer: A. If we join environment projects more often, we can help save the Earth.

29. My sister can’t speak Vietnamese.
Answer: B. I wish my sister could speak Vietnamese.

30. The new supermarket is bigger than the old one.
Answer: D. The old supermarket isn’t so big as the new one.

31. It took him two hours to do his homework.
Answer: D. He spent two hours doing his homework.