(·北京 27)Children who are not active or diet is high in fat will gain weight quickly.A

问题补充：

(·北京，27)Children who are not active or diet is high in fat will gain weight quickly.

A. what

B. whose

C. which

D. that

答案：

A. what

(答案→)B. whose

C. which

D. that

解析：句意：不是很活跃，或者饮食中脂肪含量太高的孩子会很快长胖。先行词为children，or连接两个并列的定语从句，第一个定语从句的引导词为who，第二个引导词为考查点，先行词children在第二个定语从句中与diet形成所属关系：childrens diet，故选择B项。