—I can't give up smoking, doctor.
—For your health, I'm afraid you _____.    
[     ]
A. may
B. can
C. have to
This history book _____ be Bob's sister's. His sister is only a baby.   
[     ]

A. must
B. might
C. can't

He _____ go out because the stove was on fire.
[     ]
A. may not 
B. can't 
C. couldn't 
D. might not
We can _______ Chinese and English.         
[     ]
A. say          
B. tell          
C. speak        
D. speaks
句型转换.
1. Can you write to me soon? (作否定回答)
    _____, I _____.
2. I want a dictionary. (改为否定句)
    I _____ _____ a dictionary.
3. Maria's pen friend speaks French. (对划线部分提问)
    _____ _____ does Maria's pen friend speak?
4. They like the food about China. (改为一般疑问句)
    _____ they _____ the food about China?
5. She has some storybooks.(改为否定句)
    She _____ _____ _____ storybooks.
Work ______ first!      
[     ]
A. must comes    
B. must come    
C. must to come
The book ______ be Jim's because his name is on it.     
[     ]
A. cant    
B. must      
C. can't
It's very warm. You           wear the coat.          
[     ]
A. must                      
B. don't have to
C. have to                    
D. mustn't
—Mom,can I go to play football now?      
—No,you    finish your homework first.
[     ]
A. must              
B. can      
C .could            
D. may
在横线上填上适当的助/情态动词。
1. —Must I finish the work now?
    —No, you _____.
2. —Can you speak French?
    —No, I _____.
3. —Do I need to call Mr. Black?
    —Yes, you _____.
4. —May I open the door now?
    —No, you _____. It's too noisy outside.
5. －May I go now?
    —Yes. You _____.
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