10. They began building this house 2 months ago.
=>They have ………………………..………
11. My father started to work in this factory last week.
=>My father has………………………
12. He started living in Ho Chi Minh city when he was 8.
=>He has……………………………
13. He learnt English when he was 18.
=> He has ………………………………………………
14. They have worked in that factory for five years.
=>They began ………………………..
15. We have learnt English for four years.
=>We started.................................................................
16..My father started to give up smoking last year.
=>My father has..............................................
17.They have worked in that factory since 2001.
=>They started.....................................................
18. Lan hasn't written to Maryam for a month.
=>Lan didn't.........................................................
19. How long have you learnt French ?
=>How long ago.........................................?
20. How long have you bought this car ?
=>When did................................?
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Sinh Học lớp 12
