1. Can I open the window? - Yes, .................... course.

2. He became fed .................... politics and resigned.

3. We are tired .................... waiting. We have been here for 35 minutes.

4. Do we have to learn this poem .................... heart?

5. The student was doing the exercises .................... her own.

6. How many candidates participated .................... the debate?

7. The champion did not take part .................... the competition because of his illness.

8. It is .................... you. I cannot make this decision.

9. The weather is beautiful. Let's go .................... a walk.

10. The CEO is away .................... business.