what the color of floor used to be 这句话语法对否?

what the color of floor used to be 这句话语法对否? what did the color of the floor use to be还是What is the color I used to be afraid of the dark.这句话的句子成分怎么分? there used to be river in front of the city didn't there?这句话 请问这两句话语法对否? please put it in the place where it used to be 这句话为什么对? What the color of The floor of the ocean have many riches that can be used by What kind of shoes does she like?这句话对否? what the color of LOVE? 对括号里的句子提问He used to be afraid of (the dark.) Good if not well reported,what used to be God 这句话该如何翻译呢?