Chia động từ trong ngoặc sao cho phù hợp

Chia đt trong ngoặc sao cho phù hợp
1.      You (find)………………….. watching TV interesting ?

2.      It is very important (reduce)………………using electricity.
3.      When I was small, I often ( walk)…………………….to school.
4.      I save so much money. I ( buy) ………………. a new car.