不變?cè)飧膶懢渥?
1.he became a doctor 5 years ago.
(1) he ____ _____a doctor____5years.
(2) it ____five years ____he became adoctor.
(3) it____ ____ five years ____be became adoctor.
2.his grandfather died ten years ago.
(1)his grandfather____ ____ ____for ten years.
(2)it____ten years___his grandfther died
(3)it____ ____ten years since his grandfather____.
3.wu peng joined the league in 1998 .
(1) wu peng ____ ___a league member for four years.
(2) wu peng ____ ___ ____the league for four years.
(3) wu peng ____ ____ a league member ___1998.
4.the film began an dhour ago
(1) the film ____ ___ ___for an hour .
(2) ____ ____ an hour since the film____
5.tom ____ ____ ____ ____ liome for 3 weeks.