Can you believe that in     a rich country there should be      many poor people？

—What do you think about smoking?—Well，just as someone puts ________，smoking kills.

My deskmate exercises regularly every day，so he is always________and studies efficiently.

Don’t think you are _______ when you make a mistake _______, since no one is perfect.

(2013·黑龙江高考适应性考试)When realizing the guard of the supermarket had spotted him，the thief ________ the exit quickly.