Look! The light in the room is still on. Mr. Liu          at work.
[     ]
A. must
B. can't be
C. must be
D. have to be
______ I do my homework first?  No, you ______ do it after supper.           
[     ]
A. Must, can    
B. Can,  are      
C. Must, must    
D. Can, must
—Can you do this Maths problem?
—Yes, I _______.
[     ]
A. am    
B. do          
C. does       
D. can
—_____ I open the window, Mum?
—No, you _____. It's cold outside.
[     ]
A. Can, may not
B. Can, mustn't
C. May, may not
D. May, mustn't
—Can I borrow some money?  
—Sorry, you ______.  
[     ]
A. mustn’t.
B. can’t.
C. don’t.  
D. may not.
—_____ I  watch TV now, mum?
—No, you can't. You _____ do your homework first.
 [     ]

A. Do; can't
B. Can; I don't
C. Can; can't
D. Can; must

—Must I take a bus?
—No, you _______. You can walk there.  It's not far.     
[     ]
A. must not        
B. don't
C. don't have to    
D. had better had to
— _________ I sit here?        
— No, you __________.
[     ]
A. Must; can't
B. Do; can't
C. Can; can't
D. Can; don't
-It's dark. ______ I ______ the light, Mr Wu?        
-Yes, please.       
[     ]
A. Can, open
B. May, open
C. May, turn on
D. May, turn off
We _____ bring the bag into the supermarket, but we _____ use a shopping
basket.        
[     ]
A. can; can't  
B. can't; can  
C. must; mustn't  
D. mustn't; must
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