   surprise   Really? You only review your lessons in one month? Does it work?     neutral   Of course, it's useful. And it's very crucial to have the copies of teacher's notes, because most questions in the exam are based on them.  
    surprise   Wow, and all the key points are included in them? You're so smart!     neutral   But the exam is not as simple as you may imagine. We have to stay up late.  
    neutral   Do you have the classrooms open for the whole night?     neutral   
 Not quite. I usually start doing my exams when everyone has gone to sleep, at midnight
 Yes.    happiness-thanks a lot! Your method helps me save much time.