IV. Rewrite the sentences so that they are nearest in meaning to the sentence printed before them.
26. The villagers in the raged flood were evacuated to the safe place by the rescue workers last night. ( Câu bị động của thì QKĐ: was/ were + Vpp )
27. If they had a map, they wouldn't get lost. ( Câu điều kiện loại 2, diễn tả điều không có thật ở hiện tại hoặc tương lai )
28. Many rivers and lakes are poisoned because factories produce waste and pour it into rivers and lakes. ( Câu bị động của thì HTĐ: am/ is/ are + Vpp )
29. The tortoise was running while the hare was sleeping. ( S + was/ were + V-ing while S + was/ were + V-ing )
30. Although the girl worked hard, her stepmother wasn't happy. ( Although + clause )
V. Write complete sentence using the suggested words.
31. Noise pollution in big cities leads/ has led to hearing problems. ( Ô nhiễm tiếng ồn ở các thành phố lớn đã / đang dẫn đến các vấn đề về thính giác. )
32. Lots of aquatic animals die/ have died because of oil spills. ( Rất nhiều động vật thủy sinh chết vì tràn dầu. )
33. If you were the president of the country, what would you do to protect the environment? ( Nếu bạn là chủ tịch nước, bạn sẽ làm gì để bảo vệ môi trường? )
34. One way to save the environment is using/ to use renewable energy sources. ( Một cách để tiết kiệm môi trường là sử dụng các nguồn năng lượng tái tạo )
35. This boy suffers is suffering/ has suffered from birth defects because his parents were exposed toradioactive pollution. (  Cậu bé này bị dị tật bẩm sinh vì cha mẹ cậu đã tiếp xúc với ô nhiễm phóng xạ. )

VI. Use the correct form of the word given in each sentence.
36. had finished ( QKHT: had + Vpp )
37. will have ( câu điều kiện loại 1: If + S + HTĐ, S + will + V )
38. has been taught ( bị động thì hiện tại hoàn thành: have/ has + been + Vpp )
39. was sleeping ( QKTD: was/ were + V-ing )
40. to help ( would like so do do sth )