Làm giùm em bài này vs

SO->BECAUSE/AS/SINCE->BECAUSE OF

1. Because the weather was bad, we postponed the picnic yesterday.
2. As it rained heavily, they didn't go for a picnic
3. Since I love my city, I will work there.
4. We didn't go out for a walk because it was snowing
5. It is national holiday so you won't find many shops open.
6. He was sick so he didn't do to school yesterday.
7. Because of his bad behaviour, he found himself in trouble.
8. Because of her carelessness, she broke the cup.
9. Because of teh polluted water, we can't swim in that river.
10. because of the heavy rain, we postponed the picnic.
11. Because there is too much exhaust fume, people have to wear gauze masks in the streets.