The only candidate______ can hope to defeat him finally quits.
【正确答案】 C
【答案解析】考查先行词的用法。定语从句中,当先行词由形容词的最高级或由序数词last,next,only等限定词修饰时,关系代词只能用that。当先行词是all,everything,anything,nothing,little,much等时,也只能用that。