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In many countries in the process of (1. industrialize--> industrialization), overcrowded cities present a major problem. The (2. underpopulation--> overpopulation) of towns is mainly caused by the drift of (3. great--> large ) numbers of people (4. in--> from) the rural areas. The only long-term solution is (5. make--> to make) life in the areas more (6. attractively--> attractive), which would encourage people to stay (7. here--> there). This could be achieved by providing incentives (8. to--> for) people to go and work in the villages. Moreover, facilities in the rural areas, (9. so as--> such as) transportation, health, and (10. educational--> education) services should be improved.

− Cấu trúc "used to" đã từng
+ Chủ động: S + used to + V(nguyên thể)
+ Bị động: S + used to + V(pp)
− Cấu trúc:
+ Chủ động: make sb do sth -> bắt ai đó làm gì
+ Bị động: be made to do sth -> buộc phải làm gì
:))
1 used to be(THAM KHẢO C1)
2 didn't use to transport
3 used to dye
4 used to kill
Cảm ơn em