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1. Because the traffic was heavy, we couldn't cross the road.
The traffic was heavy, so we couldn't cross the road.
2. Because the price of the house was high, they didn't buy it.
The price of the house was high, so they didn't buy it.
3. Because the weather was cold, she wore a coat.
The weather was cold, so she wore a coat.
4. Because the performance was long, she felt sleepy.
The performance was long, so she felt sleepy.
5. Because the weather was hot, he carried the bed on to the roof of his house.
The weather was hot, so he carried the bed on to the roof of his house.
6. Because the play was funny, we couldn't stop laughing.
The play was funny, so we couldn't stop laughing.
7. Because of the heavy rain, they stayed at home.
It raained heavily, so they stayed at home.