Объяснение:

1.haven't been

2.have reached

3.has met

4.has done

5.hasn't written

6.haven't seen

7.hasn't returned

8.has already told

9.have just flown

10.have already bought

Verified answer

Відповідь:

1. have not been

2. have reached

3. has met

4. has done

5. he hasn't written

6. haven't seen

7. hasn't returned

8. has already told

9. have just flown

10. Have already bought