单选题Look! Tom is too sle

问题补充：

单选题Look!Tomistoosleepytowork．He_______upwatchingTV．A.mustn’t have stayedB.shouldn’t have stayedC.mustn’t stayD.ought not to say．

答案：

B解析从上句Look! Tom is too sleepy to work．说明他本不该熬夜看电视，而实际上是熬夜导致太困了。shouldn’t have done是“本不该做…而实际上却做了”。