问题
选择题
Jim was late for two classes this morning. He said that he forgot both of the ______.
A．rooms’ number
B．room number
C．room’s numbers
D．room numbers
答案
答案：D
考查名词作定语的用法。room 为无生命名词，不用 room’s 这样的所有格形式，在此可直接用名词作定语，后面有both因此number勇复数。