问题描述：
一个英语选择题.希望专业人士指教
How long will you stay there
A.Two and half week
B.Two and a half week
C.Two weeks and a half
D.A half and two weeks 我觉得C D 都可以为什么不选D?
How long will you stay there
A.Two and half week
B.Two and a half week
C.Two weeks and a half
D.A half and two weeks 我觉得C D 都可以为什么不选D?
问题解答：
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