It was believed that someone set fire the house deliberately.

It was believed that someone set fire __________ the house deliberately.
A. out
B. from
C. on
D. to

Đáp án D

It was believed that someone set fire to the house deliberately. – Người ta tin rằng có kẻ cố tình phóng hoả đốt nhà.
To set fire to sth: đốt, nhóm lửa đốt cái gì