—?—It ‘s black.A.What’s this B.Who is itC.What color is it

问题补充：

—?

—It ‘s black.

A.What’s this B.Who is itC.What color is it

答案：

解析：句意：这是什么颜色的？是黑色的。根据后面的It ‘s black.可知，问句是询问颜色；故选C。