Fill in the correct preposition about, of, in, on, at. 6 класс 1. my friend is keen on swimming. 2. he is good __at_ english and history. 3. but i am fond __of_ cycling and fishing. 4. we are mad . 5. i am interested maths.

1. My friend is keen on swimming
2. He is good at English and history.
4. But I'm fond of cycling and fishing.
5. We are mad about football.
6. I'm interested in Maths.