剩余法估价中调查土地位置时，要掌握土地所在城市的()

A.性质

B.工业状况

C.生活状况

D.设施状况

Successful people have some good qualities and above all, they are never ________ a simple life so they keep fighting until they are top ones．

A．interested in

B．curious about

C．content with

D．confident in