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We got lost because we didn't have a map.

They missed their flight because they didn't wake up on time.

He wore his sunglasses because it was very sunny outside.

My teacher was angry with me because I didn't do my homework.

The fridge didn't work because it wasn't plugged in.

She had a party because it was her birthday.

The school was closed because it was school break.

She had a sore throat because she ate a lot of ice-cream.