Of the two brothers, Bill is ______ younger one, and he is a quiet boy, ______ that most adults like very much.

A．a; one

B．a ; the one

C．the; one

D．the ; the one

科目 英语   题型 单选题   难度 较难

知识点： 与数量有关的代词和限定词 冠词的用法辨析