Choose the correct variant.

1)i am planning (to visit/visiting) my granny next week.
2)he suggested (to buy/buying) some food.
3)does sally enjoy (to go/going) to the gym?
4)john refused (to answer/answering) my question.
5)fred can’t afford (to travel/travelling) this year.
6)i don’t mind (to wash up/washing up).
7)ben likes (to play/playing) chess.
8)harry can’t stand (to work/working) on saturdays.​