Those suffer from headache will find they get relief from this medicine.
A. that
B. who
C. which
D. whom
网友回答
A. that
(答案→)B. who
C. which
D. whom
解析：考查定语从句。本题定语从句的先行词是those，定语从句关系动词who指代those在句中做主语。当先行词是指人的those的时候，如果使用关系代词，要使用who,而不是that。Which的先行词必须是物，whom在句中做宾语。句意：那些患头痛病的人将会从这种药里得到缓解。故B正确。