11、Walking alone in the dark, the boy whistled to _____ his courage.
A．hold up    
B．keep up   
C．set up     
D．take up

12、I’m so glad you’ve come here to _____ this matter in person.
A．lead to     
B．see to    
C．turn to     
D．refer to

13、---OK, I’ve had enough of it. I give up.
---You can’t _____ your responsibilities.
A．run off with   
B．run up against   
C．run out of   
D．run away from

14、The athlete’s years of hard training _____ when she finally won the Olympic gold medal.
A．went on      
B．got through     
C．paid off      
D．ended up

15、They are broadening the bridge to _____ the flow of traffic.
A．put off       
B．speed up       
C．turn on       
D．work out

16、----You look upset. What’s the matter?
----I had my proposal _____ again.
A．turned over   
B．turned on   
C．turned off   
D．turned down

17、----Are you still mad at her?
----Not really, but I can’t _____ that her remarks hurt me.
A．deny         
B．refuse     
C．reject       
D．decline

18、I’d prefer to _____ my judgement until I find all the evidence.
A．show          
B．express    
C．pass        
D．reserve

19、As the story _____, the truth about the strange figure is slowly discovered.
A．begins        
B．happens   
C．ends        
D．develops

20、Knowledge and learning are important if we want to be successful, but they may also ______our thinking.
A．direct        
B．limit       
C．change     
D．improve

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