选择填空。
I am afraid we ______ go. It's going to rain.
[     ]
A．can't
B．aren't
C．don't
—Whose book is this?
—It ____  be Linda's. It has her name on it.      
[     ]

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

Mrs. Green is ________ her purse, but she can't ________ it.
[     ]
A. looking for; find
B. looking at; find
C. seeing; looking for
D. finding; look for
_____ he is in reading room now.  
[     ]
A. Maybe          
B. May be            
C. May
—Where is your father now?    
—I'm not sure．He _______ be in the kitchen．
[     ]
A. may            
B. must            
C. will          
D. need
—Must I return the book tomorrow?
—No, you _____. You _____ keep it for a few days.
[     ]
A. mustn't  may      
B. mustn't  must
C. needn't  must      
D. needn't  can
—May I take the magazine out of the library ?
—No, you _________.
[     ]
A. needn't      
B. may not          
C. mustn't
—You ______ play here, children. It’s dangerous.    
—OK.
[     ]
A. won’t        
B. may not      
C. don’t have to    
D. mustn’t
—There is someone in the classroom.
—It ________ be Lucy. She always gets to school early.
[     ]
A. can      
B. may      
C. must        
D. mustn't
I’m too tired,so I      sit down and rest every five minutes.
[     ]
A.must   `        
B.need            
C.have            
D.have to
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