问题
选择题
People who eat a balanced diet should be healthier than _____ only eat biscuits.
A．all which
B．those who
C．that who
D．those what
答案
答案：B
题目分析：句意:饮食均衡的人应该要比那些只吃饼干的人要更健康。比较级中代指比较的对象单数用that,复数用those。those 后跟有一个定义从句，引导词应是who，what 不能引导定语从句，故选B。