Ex1
1. has put
2. has made
3. Has the delegation returned home?
4. have opened
5. haven't translated
6. Have you ever been in St Petersburg?
7. haven't bought
8. hasn't changed
9. has broken down
10. has just installed
11. has bought
12. Have the Smiths sold their house yet?
ex2
1. Have you had a holiday this year yet?
2. What is the most beautiful country you have ever visited?
3. Did he see Tom in the past few days?
4. Has Kate played tennis recently?
5. Have you eaten anything today ?
6. Have you a holiday this year yet?
ex3
1. We haven't ordered yet. ...
2. Ted has just gone out. ...
3. Has your dad been to Canada?
4. My cousin has bought a new. ...
5. Has Charles ever seen your new flat?
6. has opened