1. Because of my sickness, I do not go out.
2. Because of the polluted water, we can’t swim in that river.
3.Because of a sore leg, she has difficulty in walking.
4.Because of his bad behaviour, he found himself in trouble.
5.Because of snowing, we didn't go out for a walk.
6.Because he is good looking, he is popular with many girls.
7.Because his serious sick, he couldn't come to the class.
9.Because there is so much exhaust fume, people have to wear gauze masks in the street.
10.Because their good performance, they won the first prize.