[{"question":"I didn't hear the phone. I ...............","answers":["must have slept.","must have been sleeping.","must sleep.","must be sleeping."],"correct":"must have been sleeping.","order":"1"},{"question":"John leaves work at 8 and it's 8.10. He ..........","answers":["must be at work.","must be working.","must be driving home.","must have been driving home."],"correct":"must be driving home.","order":"2"},{"question":"They never go on holiday. They ..................a lot of money.","answers":["can't have","can't be having","can't have had","can't have been having"],"correct":"can't have","order":"3"},{"question":"We've won the lottery! You ...........................","answers":["must have joked!","must have been joking!","can't be joking!","must be joking!"],"correct":"must be joking!","order":"4"},{"question":"John wasn't at work yesterday. He ...............a day off.","answers":["can't have","must have","must be having","must have had"],"correct":"must have had","order":"5"},{"question":"The teacher's checking Maria's work. She ................it already!","answers":["can't have finished","can't be finishing","must finish","can't finish"],"correct":"can't have finished","order":"6"},{"question":"Paul is taking his umbrella. It ...............","answers":["must be raining.","must have rained.","must have been raining.","must rain."],"correct":"must be raining.","order":"7"},{"question":"Peter has passed his entrance exams. He ....................hard.","answers":["must be studying","must study","must have studied","can't have studied"],"correct":"must have studied","order":"8"},{"question":"They haven't lived here for very long. They ..........many people.","answers":["can't know","can't be knowing","can't have known","can't have been knowing"],"correct":"can't know","order":"9"},{"question":"Sarah knows a lot about films. She ............to the cinema a lot.","answers":["must have gone","must go","can't have gone","can't go"],"correct":"must go","order":"10"}]