19. A. told
→ Câu đúng: "The customer told me that he wanted to buy the latest smartphone."

20. C. this Thursday
→ Câu đúng: "Chris asked me what time I would be at the space museum this Thursday."

21. C. was going to
→ Câu đúng: "Mary said to me that she was going to see a film about astronauts the following weekend."

22. B. I hope you can help me.
→ Sarah trả lời: "I hope you can help me."

23. C. do/improve
→ Câu đúng: "Henry often uses his laptop and his tablet to do research and improve his computer skills."

24. B. The sale is at the weekend.
→ Ý nghĩa: "LAST SALE" chỉ ra ưu đãi chỉ áp dụng vào Thứ Bảy và Chủ Nhật.

25. B. did she buy → Sai. Sửa thành: she had bought.
→ Câu đúng: "Fred asked her if she had bought this games console two weeks before."

26. D. now → Sai. Sửa thành: then.
→ Câu đúng: "My sister said that she was chatting online with her friends then."

27. B. repair
→ Nghĩa tương đồng với "fix".

28. B. lacking
→ Nghĩa trái ngược với "gaining" (tăng lên).

29. exploration
→ Câu đúng: "Space exploration can help humans learn more about air, water and soil to reduce the pollution on Earth."