My father (work) as a chief engineer for twenty years before his retirement. Harry (work) in the same job for thirty years

Giúp mình giải những câu này:
1. My father ... (work) as a chief engineer for twenty years before his retirement
2. Harry ... (work) in the same job for thirty years
3. What time ... (you/ get) to work this morning?
4. Martin ... (be) to greece five times. He loves the place
5. They ... (not/go) to the party last sunday.
6. It's the fifth time you ... (ask) me the same question
7. Of course I can ride a bike. But I ... (not/ride) one for years
8. Put your wallet away. I ... (already/pay) for everything.
9. I ... (know) her since I ... (study) in the United States.
10. My best fiend ... ...(leave) for Paris two months aga, but I ... (not/receive) a letter from him yet
11. We ... (move) here in 1993. We ... (be) here a long time now