Bài 15.1. viết lại câu sử dụng liên từ because/since/as 1.She saw the wanted man in a small coffee shop. She phoned the police. =>because She saw the wanted man in a small coffee shop, She phoned the police 2.The teacher is sick. We’ll have no class tomorrow. =>because The teacher is sick, We’ll have no class tomorrow 3.She walked slowly. Her leg was injured. 4.Mary looks happy. She has just got good marks. 5.He came to the office 10 minutes late. He missed the first bus. 6.She coughed and sneezed. The doctor said she had to stay out of crowd. 7.It got dark. I couldn’t read the letter. 8.I didn’t come in time. There was a traffic jam. 9.He stayed at home yesterday. His mother was sick. 10.We didn’t want to go out. It rained heavily 11. I came here .I wanted the English course 12.i liked workers.they have a high fighting spirit 13.Son likes to spend his vacation in Dalat .The weather is always fine 14.nam took engineering . His uncle advised him to choose 15.lan studied late at night.She had a lot of housework to do