the mayor of London admitted that he was impressed by the cheap cost of beijng's Subway,()ridders are charged 2 yuan.为什么选where,而不选as呢?as表示因为,原因状语不可以么?

问题描述:

the mayor of London admitted that he was impressed by the cheap cost of beijng's Subway,()ridders are charged 2 yuan.
为什么选where,而不选as呢?as表示因为,原因状语不可以么?

where 这里代 in Beijing