Инфинитив или герундий. Урок английского языка

1. We go swimto swimswimming every week.

2. Give up smoketo smokesmoking.

3. It is difficult answerto answeranswering the question.

4. We enjoy danceto dancedancing.

5. She was busy studyto studystudying for her exams.

6. I am looking forward to hearto hearhearing from you soon.

7. The job involves prepareto preparepreparing reports for the managements.

8. Do you enjoy singto singsinging?

9. If you have any questions, don't hesitate callto callcalling me.

10. He swore never doto dodoing that again.