what color is their hair还是what color are their hair

what color is their hair还是what color are their hair what color are their hair?hair加不加s what color is your hair的回答 Then what color are their sweaters. What color are their pencil cases? what color is their new car 缩写color is What is the _____ ______ their hair? What color is her hair 用英语回答 what color----her hair and what color---her eyes 句中应该怎样用'is' ----What color _____ your hair?----Black. 阅读理解 what color are their pencil cases What color ( ) your shoes ( ) blue.A.is,It‘s B.are,Their C.a