-Excuse me,may I take this seat?-No,you _____.A may not B mustn't C had better not D all ofabove.然后想问下为什么A可以选?

问题描述:

-Excuse me,may I take this seat?-No,you _____.A may not B mustn't C had better not D all of
above.然后想问下为什么A可以选?