The capital city b of America is ________该填什么?

The capital city b of America is ________该填什么? ( ) city is the capital of USA 填" Which" 还是"What ___ is the capital city of America?空格里是填what还是where? 按实际回答（英语）Which city is the capital of America? is new york the capital of america? What is the capital of America? P___ is the capital city of France. London is the capital city of Englang. Which city is the capital of france? which is the capital city of Australia? what city is the capital of china? Which city is the capital of france