—＿＿I smoke here?—No,You are not allowed to smoke in public places.A CouldB must CmayDmight为何不选A和D

—＿＿I smoke here?—No,You are not allowed to smoke in public places.A CouldB must CmayDmight为何不选A和D
—＿＿I smoke here?—No,You are not allowed to smoke in public places.A CouldB must CmayDmight
为何不选A和D

—＿＿I smoke here?—No,You are not allowed to smoke in public places.A CouldB must CmayDmight为何不选A和D
could 通常这样用：Could you please(一种表示客气,委婉的语气）.而不是could I .
might 也是用于委婉的语气中,不可能自己对自己委婉吧.
表请求的时候通常 是说 May I ...或 Can I .

May I 表示“我可以……吗”，固定搭配

could，might为过去式，may表示委婉的请求

表示请求许可用may