If you keep still, you may sit ____ this end of the boat ____ the other.
[     ]
A. both; and
B. either; or
C. neither; nor
D. not; but
Work hard________ you will succeed.   
[     ]
A. and            
B. so            
C. or              
D. or not
Do come on time this evening, _________you will miss theperformance.    
[     ]
A. and          
B.or            
C. so            
D. but
You have failed two tests. You'd better start working har-   der,________you won't pass the course.      
[     ]

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

The animals that are having winter sleep look___________     dead. You can't wake them
up by touching.    
[     ]
A. as well as                      
B. as good as      
C. as far as                          
D. as soon as
The cost of living in Glasgow is among the lowest in Britain,________ the quality of life is probably one of the highest.               
[     ]
A. since  
B. when    
C. as    
D. while
There are many factors contributing to the explosion of being too fat in the United States and the world,
______ the fundamental changes in the composition of their diet are first among them. 
[     ]
A. so
B. for
C. but
D. however
Most whales must come up for air after several minutes, ______ a few can stay under water for an hour or more.  
[     ]
A. while
B. or
C. for
D. so
I thought Tom was dropping his head low______ the text, _____, in fact he was sleeping.
[     ]
A. to read,  when                  
B. to be reading,  since  
C. read,  where                    
D. reading,   while


Fishing is my father's favorite hobby, and __________.
[     ]
A. he'd like to taking pictures as well
B. he feels taking pictures, too
C. to take pictures is also his hobby
D. taking pictures also gives him great pleasure
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