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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

1.Has... finished  

2.Did... finish  

3.have just went

4.went

5.Did... study

6.Have... sent

7.Did...call

8.haven't seen

9.has just arrived

10.Have... ever been

11.Did... enjoy

12.Didn't... finish

13.have lost

14.has had

15.When did he give up smoking

16.bought  

17.has taken it  

18.Why didn't Jim want to play

19.Have... washed it

20.was