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一 Mum, I am feeling tired and sleepy now. 一 You so late last night. [ ]A. couldn

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一 Mum, I am feeling tired and sleepy now. 一 You so late last night. [ ]A. couldn

一 Mum, I am feeling tired and sleepy now.
一 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