1. Radioactive pollution is very dangerous. It can cause abnormal growth.
[since]
______________________________________________________________
2. We did not go to school. It rained heavily . [because]
______________________________________________________________
3. I don’t have much money now, but I want to buy a new computer.
If ____________________________________________________________
4. Light pollution happens. There is a change in animals’ living patterns.
If ____________________________________________________________
5. Acid rain is dangerous. Trees’ leaves are damaged. [because of]