题目内容

— ____you interrupt now? Can't you see I'm on the phone? 
— Sorry Sir, but it's urgent.
[     ]
A.Can  
B. Should  
C. Must  
D.Would
C
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相关题目
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[     ]
A. should
B. need                
C. must            
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— There _____ be anybody in the classroom, for the lights are off.
— I'll go and check.

[     ]

A. mustn't
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[     ]
A. can
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[     ]
A. may well    
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[     ]
A. mustn't
B. isn't able to
C. needn't
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— I regret to say that I failed to rank first in the contest.  
— Come on, nobody ______win all the time. 
[     ]
A. should
B. must
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[     ]
A. can
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[     ]
A. can            
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