Will was stupefied with exhaustion, and he his head on the grass under one of the trees a

Will was stupefied with exhaustion, and he his head on the grass under one of the trees and slept, but he saw a cat acting strangely.
A. should have lied
B. ought to have lay
C. might have laid
D. must have laid

A. should have liedB. ought to have lay(答案→)C. might have laidD. must have laid解析：句意：Will过度劳累，他本来可能已经将头枕在树下的草地上睡着了，但是他看见一只猫走过来。这里表示对过去的事情的不太肯定的推测，用might have done，should have done是虚拟语气“过去本应该做却没有做”，ought to have done和should have done意思一样，也是“过去本应该做却没有做”，must have done“过去一定做了…”。所以选C。

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