6. B (economic growth: Tăng trưởng kinh tế)
7. C (migrant: chỉ người di cư với mục đích tìm công việc)
8. B (population: dân số)
9. C (câu điều kiện loại 3)
10. C (câu điều kiện loại 2)
11. A
12. D
13. B
IV/
1. B (were => had been)
2. D (will be => is)
3. A (will make => make/ have to make)
4. A (could had => could have)
5. B (has => had)
V/
1. walked
2. can/will understand
3. wouldn't have been
4. complains
5. would understand
6. had said
7. would see
8. asked
VI/
1. The topic which the passage is mainly concerned with is the current American family
2. The writer implies that there has always been a wide variety of family arrangements in America.
3. A one-person household is generally constituted by single people, usually women over sixty-five years of age.
4. The married couples whose children have grown or who have no children represent about 33,3 percent.
5. C (current: hiện tại = now)
