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Конечно, давай разберём это упражнение вместе. Нужно вставить глаголы в правильной форме: past simple или past continuous.

1. A: Why were you arriving late?
   B: I woke up in the night and couldn't get back to sleep.

2. A: Sandra was canoeing in the river when she hit a rock.
   B: Oh no! Did she hurt herself?

3. A: I was calling you all afternoon yesterday, but you didn't pick up.
   B: I'm sorry. I wasn't at home.

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