问题描述：
Jim was late for two classes this morning.He said he forgot both of the _____.
A.rooms number
B.room number
D.room's number
C.room numbers
选哪个 为什么 一定要解答为什么
A.rooms number
B.room number
D.room's number
C.room numbers
选哪个 为什么 一定要解答为什么
问题解答：
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