1.

1. If I were you, I would look for a new place to live.

2. If Lan wasn’t ill, she could join out tree planting activity.

3. If there were fewer cars on the road, there would be less pollution.

2.

1.If people really cared about the environment, they wouldn't dump waste into the lake.

2.If there was no fresh water in the world, what would happen.

3.If you were the president, what would you do to help the environment?

3.

7.They get sick so often. If they exercised more, they would be heathier.

8.If I had one million US dollars , I would build more parks in our city.

9.Quan’s mother is unhappy. If Quan tided his room every day, his mother wouldn't be so upset. .

3.If you study harder, you will pass the exam.

5.

1. If people didn't throw rubbish in the street, the street would look attractive.

2. If there was many billboards in our city, people couldn't enjoy the view.

6.

1. If there was so much light in the city at night, we couldn't see the stars clearly.

2. If we turned on the heater all the time, we woulh have to pay three milion dong for electricity a month.

7.

1. We’ll go to the beach tomorrow if it is nice.

2. I will be watching a science fiction film on TV at 9 .00 tonight.

3. We’ll need to call him more often

8.

1. Michael told me that he had been given a new laptop.

2. Olive told Chau that she was leaving Viet Nam the next day.

9. 

1. Hoa said that she wanted her room to look nice at the festival.

2. Trung said that he would clean all the class windows the next day.

10.

1. He was rescued out of the fire by the brave firefighter.

2. A big number of buildings in the city have been destroyed by the earthquake.

11.

1. ‘ He said that he hadn't said anything at the meeting the week before.

2.  Loan told Lan that she was cleaning their house.

12. 

1. Do you enjoy writing letters to your friends?

2. He has decided to install the Internet to look for information more easily.

3. She intends to participate in the program called "The survivor” to experience the life in an isolated island.

13. 

7. Our teacher didn't mind explaining the exercise until we understood it yesterday.

8. Peter denied to steal that mobile phone.

9. My mother wants me posting this letter before afternoon.

14. 

1. They haven't started the project yet.

2. My brother hates doing the same things day after day.

3. My brother usually goes fishing in his free time.

15. 

1. Many house have been destroyed by the storm in this village last week.

2. A lot of clothes, food and drinks were donated to support the victims of the flood.

16.

1. This house was built in 2015.

2.Most people had left before the volcano erupted.

3. By the time we arrived at the canyon , it had stopped snowing.

17. 

1. After Nick had done his homework, he went to bed last night.

2. Mai had lived in Hai Phong for five years before she moved to Ha Noi three years ago.

$\text{~ Chúc bạn học tốt ~}$

$\text{~ Nếu được thì cho mk trả lời hay nhất nha! ~}$

VI.

1. If there wasn't so much light in the city at night, we could see the stars clearly.

2. If we didn't turn on the heater all the time, we would not have to pay three million dong for electricity a month.

VII.

1. is ( vế trước là TL đơn nên vế sau phải là HT đơn; đây là câu đk số 1)

2. will be watching( có thời gian cụ thể là 9h trong tương lai, đây là thì tương lai tiếp diễn)

3. to call( need+ to call: cần gọi ; đây là một cụm bất di bất dịch)

VIII.

1. Micheal told me that he had been given a new laptop.

2. Olive told Chau that she was leaving Viet Nam the following day.

IX.

1. Hoa said she wanted her room to look nice at the festival.

2. Trung said he would clean all the class windows the following day.

X.

1. He was rescued out of the fire by the brave firefighter.

2. A big number of buildings in the city were destroyed by the earthquake.

XI.

1. He said that he hadn't said anything at the meeting the previous week.

2. Loan told Lan that she was cleaning their house.

XII.

1. writting ( enjoy + doing sth: tận hưởng làm cái j ; đây là một cụm)

2. to install( decide + to Vnguyên thể: quyết định làm một vc j; đây là một cụm)

3. to participate ( intend+ to Vnguyên thể: định làm cái j; đây là một cụm)

XIII.

7. explaining( don't mind + Ving: ko để tâm việc..; đây là một cụm)

8. stealing ( seny + Ving: từ chối, phủ nhận việc j đó; đây là một cụm)

9. to post ( want+ to Vnguyên thể: muốn làm j đó; đây là một cụm)

XIV.

1. haven't started ( có dấu hiệu là '' yet'' ở sau, đây là thì hiện tại hoàn thành)

2. doing ( hate + Ving: ghét làm j; đây là một cụm)

3. goes( có dấu hiệu là ''usually: thường'', đây là câu hiện tại đơn nói về thói quen)

XV.

1. Many houses in this village were destroyed by the storm last week.

2. A lot of clothes, food, and drinks were donated to support the victims of the flood.

XVI.

1. was built ( ngôi nhà này đã được xây; đây là câu bị động QK)

2. had left ( hầu hết mọi ng đã rời đi trước khi núi lửa phun trào; đây là thì QKHT chỉ một sự việc xảy ra trước một sự việc trong QK và đã kết thúc, mà vế 2 là Vqk nên vế 1 là Vhtht)

3. had stopped ( lúc chúng tôi đến hẻm núi thì nó đã hết tuyết rơi; đây là thì QKHT chỉ một sự việc xảy ra trước một sự việc trong QK và đã kết thúc, mà vế 1 là Vqk nên vế 2 là Vhtht)

XVII.

1. had done/ went( đây là câu QKHT chỉ một sự việc xảy ra trước mọt sự việc trong QK và đã kết thúc)

2. had been living/ moved( Đây là câu QKHTTD chỉ một sự việc xảy ra liên tục trước mọt sự việc trong QK và đã kết thúc)