[ Modal Verbs ]
You _______ been exhausted after working for 12 hours straight.
A. could have
B. must have
C. might have
D. should have
Select your answer:
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Grammar › ViewUsing it wisely, leisure promotes health, efficiency and happiness
A. If I could have known about
B. If I would have known about
C. Had I known about
Past Simple Tense › View
It was hot, so I ____ the window.
A. open
B. am opened
C. opened