He wasn't supposed to tell you the secret, but he did, Wasn't supposed to , might have ,  The lights are off and no one is home they ........... left., may have , must have ,  You were supposed to study for the test but you didn't , must have , should have , The package is very late . It was supposed to...........a week ago., arrive, have arrived , I have a headache. I................ slept too little , may have , must.

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