I always heard the girl______sing in her room A、next door B、the second room C、in the next door D

题目

I always heard the girl______sing in her room A、next door B、the second room C、in the next door D

答案

A
隔壁的---作后置定语修饰宾语the girl
再如：
The baby next door often bawls.
隔壁的孩子常常大哭.
来自《简明英汉词典》
The child next door carried a lantern.
隔壁的那个小孩提一个灯笼.