1. He is interested in living in the countryside
b interested in + V_ing
2. Lan and Hoa are crazy about playing handball
be crazy about + V_ing
3. I am keen on listening to music in free time
be keen on + V_ing
4. She is crazy about cleaning the floor
be crazy about + V_ing
5. I like collecting stamp best
like + V_ing
6. What subject does she like best?
What + S + V?
7. They are fond of playing marbles in their free time
be fond of + V_ing
