Do you know the boy ________ is sitting next to Jim? Yes. He is Jim’s friend. Th

题型：不详难度：来源：

Do you know the boy ________ is sitting next to Jim?
Yes. He is Jim’s friend. They are celebrating his ________ birthday.

A．who, ninth

B．that, nineth

C．/, nine

D．which, nine

答案

A

解析

此题重点考查定语从句的引导词和序数词的用法。先行词The boy 在从句中充当主语，引导词可以用who也可用that。某人的第几生日要用序数词。