1. Because Lan was sick, she didn't go to school yesterday
2. Because the rain is heavy, we don't go to work
3. Because the weather was bad, they didn't go camping
4. Because the traffic was heavy, Tom was worried
5. Because they were lazy, they got bad mark
6. Because I was ill, I didn't go to school
7. Because of the hot weather, I couldn't sleep well
8. Because of the thick fog, the train was late
9. Because of the bad weather, The plane couldn't take off
chắc đúng ó
