_____the present unemployment continue,the society would face a more troublesome situation.    
[     ]
A. Would    
B. Should    
C. Might    
D. Could
I______ thank you too much for all your help to my son while we were away from home.
[    ]
A. won't    
B. can't     
C. can      
D. will
One of our rules is that every student      wear school uniform while at school.
[     ]
A.  might        
B.  could        
C.  shall        
D.  will
It's quite warm here; we __________turn the heating on yet.
[     ]
A. couldn't
B. mustn't
C. needn't
D. wouldn't
It rained a lot during their journey, so they           have had a good time.
[     ]

A. can't    
B.  must    
C.  shouldn't  
D.  might

—I sent him the dictionary by mail this morning.
—You ______ that, for he's coming tomorrow morning.
[     ]
A. needn't have done  
B. didn't have to do  
C. needn't do        
D. mustn't do
At first sight, it ________ look like a generous offer; actually, it is a trick.
[     ]
A. may
B. must
C. shall
D. should
_______ and see how long you can ______it.   
[     ]
A. Take your breath; hold
B. Hold your breath; do
C. Catch your breath; do
D. Make your breath; make
—Where's Lucy?  
—I'm not sure. She ________ in the school library.      
[     ]
A. maybe          
B. must be          
C. may be        
D. will be
You don't have to know the name of the author. You ____ find the book by the title.

[     ]

A. can
B. need
C. must
D. would
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