Câu trả lời:
1. That book (lie) has lain on the table for week . You ( not read ) read it yet
2. You (be) been here before ? Yes, I (spend) spent my holidays here last year
3. We have never (meet) met him. We don't know what he ( look) looks like
4. The car (be ) will have been ready for him by the time he (come) comes tomorrow
5. On arriving at home I (find ) found that she had just ( leave) left a few minutes before
6. when we ( arrive) arrive in London tonight, it will probably ( rain ) be raining
7. It ( rain ) is raining hard . we can't do anything until it ( stop) stops
8. Last night we ( watch) were watching tv when the power (fail) failed
9. That evening we (stay) stayed up to talk about the town where he ( live ) had lived for some years
10. I ( sit) sat down for a rest while the shoes ( repair) were being repaired
11. Half way to the office paul ( turn) turned round and (go) went back home because he ( forget) had forgot to turn the gas off
12. London ( change ) has changed a lot since we first ( come ) came to live here
13. While we ( talk) were talking on the phone the children ( start) started fighting and (break) broke a window
14. He used to talk to us for hours about all the interesting things he (do) had done in his life
15. You know she ( stand) has been standing looking at that picture for the last twenty minutes
16. I ( spend) have spent a lot of time travelling since I ( get) got this new job