Correção de texto "student history"

(...texto inicial dado pelo livro...)

Emma ran over to classroom's door but it was locked, even the windows. Her name was written up on the blackboard and beside it someone had nailed a clock to the wall.

The time was running out and she stopped wasting her time and got back to the chair.
Feeling distressed by the exam, she took a deep breath and she started to remember about yesterday evening, when she had been studying for the exam. Suddenly the answers appeared and Emma quickly wrote them.

However, the clock went off and then she woke up. “It was a dream” she thought but the answers were there. Astonished she handed the exam in to the teacher.

(...texto final dado pelo livro...)