Question

【题目】-- Do you know the boy _______ is sitting next to Peter?
-- Yes. He is Peter's friend. They are celebrating his ____ birthday.
A.who, ninth
B.that, nineth
C./, nineth
D.which, ninth

Answer 1

【答案】A
【解析】句意：——你认识坐在Peter旁边的那个男孩吗？——是的，他是Peter的朋友，他们在庆祝他的九岁生日。这是定语从句，修饰the boy，故用who或者that。nine的序数词是ninth，故选A。