18. It takes me fifteen minutes to walk to school every morning
19: Because she is poor, she still lived in an old house
20: Because of his sickness, his father asked him to stay at home
21: Because of an accident, I was late
22: Because of her bad grades, She failed th University entrance exam
23: Because of Hoa's richness, she could buy that house
24: Because of the terrible weather, we don;t go out