=>
1. Hoa could buy that house because of being rich./ Hoa could buy that house because of her richness.
2. Because of the heavy rain, I couldn't go to school.
3. His father asked him to stay at home because of his sickness.
4. Because of an accident, I was late.
5. She failed the University entrance exam because of her bad grades.
Because S V ~ Because of + N/Ving : bởi vì