1. It takes Nga 4 hours a day to pratice English with her friends.

2. I wish you would have taken the doctor's advise.

3. He suggested using fewer plastic bags.

4. Minh has collected stamps since 2000. 

5. It's very important to keep the environment clean.

6. The last time we saw Mike was when we left university.

7. Nam said they were going to celebrate a party at the weekend.

8. Bacause it rained heavy, we couldn't go to school this morning.

9. Mark isn't old enough to get married.

10. Unless you leave me alone, I will call the police.

11. We spent 3 hours opening the door.

12. You play tennis better than me. 

13. I wish to have more time to study.

14. Mary asked if I had got free time next week.

15. Henry wishes she would have regetted buying the second-hand car.

`1.` It takes Nga 4 hours a day to practice English with her friends.

`2.` I wish you had taken the doctor's advice.

`3.` He suggested using fewer plastic bags.

`4.` Minh has collected stamps since 2000.

`5.` It's very important to keep the environment clean.

`6.` The last time we saw Mike was when we left the university.

`7.` Nam said they were going to celebrate a party at the weekend.

`8.` Because it rained heavily this morning, we couldn't go to school.

`9.` Mark isn't old enough to get married.

`10.` Unless you leave me alone, I will call the police.

`11.` We spent 3 hours opening the door.

`12.` You play tennis better than I do.

`13.` I wish I had more time to study.

`14.` Mary asked me if I had got any free time the following week.

`15.` Henry wished he hadn't bought the second-hand car.

@ `Ly`