题干
The kindhearted man，who thinks ________his duty to help poor people，is popular with many people who know him.
A：it
B：that
C：one
D：this
答案(点此获取答案解析）
A
The kindhearted man，who thinks ________his duty to help poor people，is popular with many people who know him.
A：it
B：that
C：one
D：this
