1. He has been her when he was 12.
-> he started............................
2. Lan hasn't written to me for a month.
-> Lan didn't..........................
3. My father started to give up smoking last year.
-> My father has......................
4. When did you start to listen to classical music?
-> How long................
5. I last saw her 10 years ago.
-> I haven't......................
6. How long have you bought this car?
-> When........................
Loga
Sinh Học lớp 12
