Question

【题目】—What should I give my sister on her birthday?
— give her a dress?
A.Why don't
B.Why not
C.Why not you
D.Why to

Answer 1

【答案】B
【解析】句意：-我姐姐生日的时候我该送给她什么呢？-为什么不送给她一条裙子？Why don't为什么不，后面应有主语；Why not...为什么不…，后面跟动词原形；Why not you多了一个主语you；Why to形式不对。根据句意可知应选B。