問題詳情

36. John looked so exhausted this morning. He ________ all night.
(A)must have been up
(B)must be up  
(C)should have been up
(D)should be up

參考答案

答案:A
難度:簡單0.726708
統計:A(117),B(14),C(16),D(3),E(0)

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