Jack wasn ' t saying anything but the teacher smiled at him _____ he had done something very clever.
[     ]
A. as if                
B. in case  
C. while              
D. though
The school rules state that no child shall be allowed out of the school during the day,__________
accompanied by an adult.  
[     ]
A. once              
B. when  
C. if                  
D. unless
_________I meet him, I always think of the things which happened between us.
[     ]

A. Every time        
B. For the time  
C. The night          
D. At no time

The  wise  parents  can  tell  whether their children are telling the truth __________ they listen
to their excuses to wrong deeds.  
[     ]
A. the first time   
B．for the first time  
C．every time  
D. for every time
If a lot of people say a film is not good, I won't bother to see it, or I'll wait _____ it comes out on
DVD.
[     ]
A. whether    
B. after    
C. though      
D. until
—What's going on between you and Peter?  
—We had a fight. I regarded him as my trustworthy friend _____ to my shock, he gave me away.  
[     ]
A. unless        
B. since        
C. if          
D. until
-Our holiday cost a lot of money.  
-Did it? Well, that doesn't matter_____   you enjoyed yourselves.                                                          
[     ]
A. as long as    
B．unless  
C. as soon as    
D. though
      we are not attacked by nuclear weapons, we promise that uncler no circumstances       use
the bomb first but we rescrve the right to use it for counter-attack when necessary.      
[     ]
A. As long as; we shall      
B. If; shall we      
C. So long as; shall we      
D. Even if; we shall
________time goes by, Mother's hair has turned grey and the wrinkles on her face deeper.
[     ]
A. As  
B. With
C. While      
D. Because
Getting rid of bad habit is________forming a good one.
[      ]
A. an effort much as  
B. much an effort as
C. as an effort much as  
D. as much an effort as
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