You ____ choose the blue one or D 为什么不行呢?-Which skirt should I choose?-You ____ choose the blue one or the red one.Either is OK.A.may\x05B.must\x05\x05C.need\x05\x05D.shouldD 为什么不行呢?为什么答案是A呢?

You ____ choose the blue one or D 为什么不行呢?-Which skirt should I choose?-You ____ choose the blue one or the red one.Either is OK.A.may\x05B.must\x05\x05C.need\x05\x05D.shouldD 为什么不行呢?为什么答案是A呢?
You ____ choose the blue one or D 为什么不行呢?
-Which skirt should I choose?
-You ____ choose the blue one or the red one.Either is OK.
A.may\x05B.must\x05\x05C.need\x05\x05D.should
D 为什么不行呢?为什么答案是A呢?

You ____ choose the blue one or D 为什么不行呢?-Which skirt should I choose?-You ____ choose the blue one or the red one.Either is OK.A.may\x05B.must\x05\x05C.need\x05\x05D.shouldD 为什么不行呢?为什么答案是A呢?
命令式的口气“你该怎样怎样”,用You should do.
而楼主的句子是“你既可以选蓝的,也可以选红的.二者皆可”,这个语气就不是命令式的“应该.”,是建议式的,因此选A.may

should一般表示应该做。。。后面一般不接选择分支

He asked his son which he was going to choose the small one or the big one He asked his son did he want the small one or the big

a. 可以 b.必须 c.需要 d.应该