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-Mum, I am feeling tired and sleepy now. -You so late last night. [ ]A. couldn’t

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-Mum, I am feeling tired and sleepy now. -You so late last night. [ ]A. couldn’t

-Mum, I am feeling tired and sleepy now.  
-You          so late last night.   [     ]A. couldn’t have stayed up            
B. mustn’t have stayed up  
C. shouldn’t have stayed up          
D. needn’t have stayed up

试题答案

C