6. Let's collect unused clothes.
7. She failed in the exam because of her laziness.
8. Ba is tired because he stayed up late watching TV.
9. Hoa broke the cup since she was careless.
10. Since it was raining, we decided to postpone our camping.
11. She was busy, so she couldn't join us.
12. What about going to the cinema tonight?
13. Shall we use energy-saving bulbs?
14. She was not beautiful but she took part in a beauty contest.
15. If you don't work hard, you won't pass the exam.
16. Unless you start working hard now, you won't be able to pass the final exam.
17. She wanted to go home because she was tired.
18. If you don't water these plants, they will die.
19. If we don't hurry up, we will be late for the concert.
20. A new school will be built next month.
21. It is not easy to find an apartment in a big city
22. The problem can be solved.
23. They have lived in this village for 20 years.
24. Although he was tired, John finished his homework.
25. I haven't seen Nam for 3 years

6.Let's collect unused clothes. (Let's + V_inf)

7.She failed the exam because of her laziness.

8.Ba is tired because she stayed up late watching TV.

9.Hoa broke the cup since she was careless.

10.Since it was raining,we decided to postpone our camping.

11.She was busy,so she couldn't join us.

12.What about going to the cinema tonight?

13.Shall we use energy-saving bulbs?

14.She wasn't beautiful but she took part in a beauty contest.

15.If you work hard,you will pass the exam. (câu điều kiện loại 1)

16.Unless you start working hard now,you won't be able to pass the final test.

17.She wanted to go home because she was tired.

18.If you don't water these plants. (câu điều kiện loại 1)

19.If we don't hurry,we'll be late for the concert. (câu điều kiện loại 1)

20.A new school will be built next month. (câu bị động thì tương lai đơn)

21.It is not easy to find an apartment in a big city.

22.The problem can ve solved. (câu bị động với modal verb)

23.They have lived in this village for 20 years.

24.Although John was tired,he finished his homework.

25.I haven't seen Nam for 3 years.