—I don’t know where to go for a holiday.
— traveling to Hainan Island?
A. Why not
B. Why don’t
C. Let’s
D. What about
网友回答
A. Why not
B. Why don’t
C. Let’s
(答案→)D. What about
解析:Why not=Why don’t you,为什么不……;Let’s 让我们……,接不带to的不定式做宾语补足语;What about……怎么样。About是介词,接名词或者动名词做宾语。联系上文,我不知道去哪儿度假。可知选D,去海南岛旅游怎么样?