Question

 Look! That fellow is too sleepy to work. He ______ up reading until midnight.

A．mustn’t stay	B．mustn’t have stayed
C．ought not to stay	D．should not have stayed

Answer 1

D

考查情态动词+have done的用法。句意“看！那个家伙太困了以至于不能好好工作。他本不应该熬夜看书。”shouldn’t have done“本不应该做却做了某事”。故选D。