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7. Because the performance was long, she felt sleepy.
The performance was long, so she felt sleepy.
8. He carried the bed on to the roof of his house because the weather was hot.
The weather was hot, so he carried the bed on to the roof of his house.
9. We couldn't stop laughing because the play was funny.
The play was funny, so we couldn't stop laughing.
10. They stayed at home because of the heavy rain.
It rained heavily, so they stayed at home.
