Tìm số nguyên dương n nhỏ nhất sao cho có thể xóa n số từ các số {1, 2, . . . , 2005} sao
cho các số còn lại thỏa mãn tính chất không có số nào là tích của hai số khác.

I. Use the words in the box to fill in the blanks.

1. The firm has been taken ………………………………. by one of its main competitors.

2. Because of the continued loss, the factory ………………………………. down.

3. I had to turn ………………………………. a job offer from a theatre because the pay was too low.

4. His ultimate goal was to set ………………………………. his own business.

5. I was the only employee! - but I set ………………………………. it with dedication and refused to give up, whatever happened.

6. She set ………………………………. with the aim of becoming the youngest ever winner of the championship.

7. They’re ………………………………. out new chocolate bars all the time.

8. I also want to speed ………………………………. our production process to make it more efficient. I’m not planning to slow ………………………………. any time soon!

V. Complete the sentences. Use the causative form with “get” where possible. If “get” is not possible, use the causative with “have”.

22. I need to ................................................................................. (the car / service)
23. The windows in this shop are usually dirty. The owners ................................................ regularly.
(them / not clean)
24. I ................................................................................. so I had to apply to another college. (my
application / turn down)
25. We should ................................................................................. (that tap / fix)
26. I ..................................................................... while I was on the underground. (my money /
steal)
27. Where .....................................................................? Was it expensive? (you / your bike / repair)
28. They ................................................................................. last week. (their electricity / cut off)