According to the passage, a person who is not willing to change his mind and hard to deal with, probably sleeps ______.

A．one's sleeping position has something to do with one's character
B．everyone has got both real and secret personalities
C．the position in which one goes to sleep is the most important one
D．when awake, one does not show one's secret personality

A．a peaceful way will soon be found
B．the teachers' strike will last long
C．students haven't been to school for two weeks
D．student can't go into the school because their classrooms are tightly locked