问题
选择题
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
答案：A
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。
