---- shall we paint the walls?
---- I prefer white. It makes us feel calm and peaceful.
A. How
B. How often
C. Why
D. What colour
网友回答
A. How
B. How often
C. Why
(答案→)D. What colour
解析：本题考查疑问词的用法。答语的信息是颜色，因此用what colour提问。句意：——我们把墙将粉刷成什么颜色？——我喜欢白色。它让我们感到镇静和安宁。