【题目】Opportunity and luck always shows appreciation for those _____ are bold in struggling.
A.whoB.thatC.whomD.which
在线课程【答案】A
【解析】
考查定语从句关系词。句意：机会和运气总是青睐那些敢于奋斗的人。先行词those指代人，在从句_____ are bold in struggling.中充当主语，应用关系代词who/that，但先行词是those时为了避免重复，不用that。故选A项。