Read this story，________you will realize that not everything can be bought with money. (2013·四川，4)
A．or B．and
C．but D．so
Not once________to Michael that he could one day become a top student in his class.
(2013·湖南，35)
A．occurred it B．it did occur
C．it occurred D．did it occur
The university estimates that living expenses for international students________around $8,450 a year，which________a burden for some of them. (2013·湖南，33)
A．are；is B．are；are
C．is；are D．is；is
At no time________the rules of the game.It was unfair to punish them.(2013·辽宁，26)
A．they actually broke
B．do they actually break
C．did they actually break
D．they had actually broken
________small，the company has about 1,000 buyers in over 30 countries.(2013·天津，5)
A．As B．If
C．Although D．Once
Only by increasing the number of doctors by 50 percent ________ properly in this hospital. (2013·大纲全国，32)
A．can be the patients treated
B．can the patients be treated
C．the patients can be treated
D．treated can be the patients
