Work hard, _____ you will fall behind others.
[     ]
A. and
B. but
C. or
D. so
All of us enjoy playing computer games, ______ we can't spend too much time on it.
[     ]
A. and
B. or
C. but
D. so
I  like English _____ I  work  hard  at  it.   
[     ]
A. but
B. and
C. or
D. with
This is Jenny, ___________ that is Jim. They are my good friends.?
[     ]
A. or     
B. and?
C. too  
Try your best to run fast, ________ you will fall behind others.
[     ]
A. and
B. but
C. so
D. or
Mary can play the trumpet ______  she can't swim. 
[     ]
A. and
B. but
C. or
He can swim very well, ______ he doesn’t want to join the club.       
[     ]
A. and        
B. but        
C. /          
D. or
Mary can play the chess________ she can't swim.    
[     ]
A. and  
B. or
C. but  
D. so
He can swim very well, _____ he doesn't want to join the swimming club.  
[     ]

A. and        
B. but        
C. /          
D. or

   __    did Ma Ya and Li Qin watch the Euro 2008 Championships,       __ I watched them.
[     ]
A. Either; or
B. Neither; nor
C. Both; and
D. Not only; but also
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