how many persons are there in the meeting room?_____ A none B no one

问题描述:

how many persons are there in the meeting room?_____ A none B no one
为什么是A

这是语言习惯,用how many 提问的时候,要回答的是针对many的问题,因此用none/或者可以肯定回答(有多少人).
如果是用No one回答,那问题应该这么问,Are there any persons in the meeting room?