Write the missing two-part verb in each sentence below; use the helping verb has or have and the past participle of the verb in parentheses.

Example: He has walked (to walk) a mile today.

1. Andre _______ ___________ (to answer) the question.

2. They _______ ___________ (to perform) in several musicals this year.

3. The interested students _______ already ___________ (to turn) in their projects.

4. This mixture _______ ___________ (to reach) the boiling point.

5. The swimmers _______ all ___________ (to shave) their heads.

6. Professor Simmons _______ ___________ (to lecture) until she is hoarse.

7. This bouquet of roses _______ ___________ (to wither) quickly.

8. The paper factories _______ ___________ (to disturb) the ecological balance.

9. Few women astronauts _______ ___________ (to apply) for the job.

10. So, you _______finally ___________(to change) your mind.

11. Until this event, the political climate _______ ___________ (to seem) calm.

12. This _______ ___________ (to happen) before.

13. The police _______ ___________ (to finish) their investigation.

14. The children _______ ___________ (to name) every puppy in the litter.

15. So far, only three students, _______ ___________ (to qualify) for the position.