英语选择：选哪个,为什么,I've forgotten both of the ().A room numbers B rooms number C rooms numbers D room number

英语选择：选哪个,为什么,
I've forgotten both of the ().
A room numbers B rooms number C rooms numbers D room number

选A,room number中的room 是修饰number的,作定语,相当于形容词,变成复数时,只在后面的number变复数就行了.