When there’s a 52 , leave the classroom quickly. Smoke makes them 53 and they can’t breathe. It’s better to put 54 over your mouth and nose. 55 when you want to get out, you should make yourself close to the floor to breathe some fresh air.
【单选题】________If you leave your work until the night before it’s due, you give up the possibility of getting input from your professor. Professors regularly give advice or at least a few useful tips during ...