--- what  color  is  your  ruler ?  --- _________ .

A.  It’s a blue      B. It’s blue.           C. It’s blue hat.

---- What color is your ruler?

---- ___________.

　　 A. It’s blue ruler

B. It’s a blue

C. It’s blue color

D. It’s blue

—       is your ruler? — It’s black and white.     

A. What color        B. What             C. Where           D. How

— _________ is your ruler?

—It’s blue.

A. What          B. What’s color       C. How            D. What color