He is the only student I’ve ever met could answer this question .
A. who ; /
B. / ; whom
C. whom ; /
D. / ; who
网友回答
A. who ; /
B. / ; whom
C. whom ; /
(答案→)D. / ; who
解析：考查定语从句。第一空student被the only修饰，从句中缺少宾语，所以关系代词用that/whom,作宾语时可省略。第二空从句中缺少主语，所以用who，故选D。