1) They _________ be tired. They went to bed at 2:00 a.m and woke up at 6:00 a.m! a) can't b) must 2) Our teacher __________ be from Brazil. I’m not sure. She speaks Portuguese and Spanish. a) might b) must 3) Marcos ________be sick. He never misses class, and he’s absent today a) must b) can't 4) Dee ______be afraid of heights. She flew on a hot air balloon last weekend. a) can't b) could

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