1. I enjoy ....... to work - it gives me time

1. I enjoy ....... to work - it gives me time to be by myself and to think.
a) to drive b) driving
2. I am good at ......... with colleagues.
a) to communicate b) communicating
3. Julia is interested in........ her own business.
a) starting b) to start
4. After hours of negotiating, we managed........an agreement.
a) to reach b) reaching
5. They came ........a new car.
a) purchasing b) to purchase
6. If we don't constantly innovate, we risk........behind our competitors.
a) tofail b) failing