___ is the capital city of America?空格里是填what还是where?

问题描述:

___ is the capital city of America?空格里是填what还是where?

What
what在句中作主语,where只能作状语(地点状语),在本句中缺的是主语,而不是状语,所以要用what而不是where

what因为句子问的是美国首都是什么
what实际是宾语,比如陈述句就是
The capital city of America is Washington.