A：are these hats?B：They are black and white.A. WhereB. HowC. WhatD. What color

问题补充：

A：are these hats?

B：They are black and white.

A. Where

B. How

C. What

D. What color

答案：

A. Where

B. How

C. What

(答案→)D. What color

解析：询问颜色时要用what color。