Инфинитив или герундий. Урок английского языка

1. I am crazy about kissto kisskissing.

2. You must cometo comecoming to my party.

3. It is difficult answerto answeranswering the question.

4. John is fond of eatto eateating ice-cream.

5. Why not goto gogoing to the cinema tonight?

6. His jokes made us laughto laughlaughing.

7. They practised playto playplaying the guitar.

8. She was busy studyto studystudying for her exams.

9. We managed arriveto arrivearriving in time.

10. Why should they doto dodoing this?