People who seldom do sports or diet is high in fat will put on weight quickly.A. whoB. wh

问题补充：

People who seldom do sports or diet is high in fat will put on weight quickly.

A. who

B. whose

C. which

D. what

答案：

A. who

(答案→)B. whose

C. which

D. what

解析：考察定语从句。先行词people后面有两个定语从句，whose diet is high in fat是第二个，whose在定语从句中作定语修饰名词。故B正确。