1. Has Tim finished
2.Did he finish
3. They have just gone out
4.went
5.Did Ann study
6. Have you sent
7.Did she call
8.They haven't seen the film yet
9. has just arrived
10. Have you ever been
11. Did you and Tom enjoy
12.Didn't you finish
13. l have lost
14. had
15. did he give up
16.bought
17.has taken
18.didn't want
19.have you washed
20. was