D. Because, because of, since, if, unless, so that, although, depsite, in spite of, so, when, after, but, however, therefore.

1. This department is an attraction in my city _____________the products are of good quality.

2. This is called a Chuong conical hat ______________it was made in Chuong village.

3.  We went to Non Nuoc marble village to buy some souvenirs __________we had eaten lunch.

4. My grandparents set up their own business ___________they were young.

5. ____________the hand-embrodered picture was expensive, we still bought it.

6. You won’t learn to use a keyboard properly ____________you practice.

7. We had no food at home , _____________we decided to go out for  a meal.

8. Can I borrow that book __________you have finished it?

9. You can’t drive a car ____________you’ve got a licence.

10. ___________we didn’t want to wake the baby up, we came in very quietly.

11. ___________we live in the sme building, I rarely see him.

12. _____________the terrible noise, I tried to concentrate on my work.

13. The bell will ring _____________there is a fire.

14. ___________you don’t know how to use a computer, it will be hard to find a job.

15. Jimmy couldn’t pay all attention to her study __________her relationship with a boy.

16. I invited her to join our trip to Trang An, _________she turned down my invitation.

17. ___________you work hard, you won’t be able to pass the final exam.

18. ___________plastic bags are hard to disovlve, they will cause pollution.

19. You can go home __________you’ve finished this exercise.

20. The world’s energy resources are limited, __________we should use them economically.

21. I don’t agree with a lot of his teaching methods. _________, he is a good teacher.

22. She isn’t English. _________, she speaks English perfectly.

23. We wanted to go to the beach; __________, it started to rain __________we stayed at home.

24. Someone switched the freezer off. _______________, all the food was spoilt.

25. Melissa tried to read the book ____________she couldn’t understand it.