1. Radioactive pollution is very dangerous since it can cause abnormal growth.
2. We did not go to school because it rained heavily.
3. If I had more money now, I would want to buy a new computer.
4. If light pollution happens, there is a change in animals' living patterns.
5. Acid rain is dangerous because of the damage to trees' leaves.
 

1. Radioactive pollution is very dangerous since it can cause abnormal growth.
2. We did not go to school because it rained heavily.
3. If I had much money now, I would buy a new computer.
4. If light pollution didn't happen, there wouldn't be change in animals' living patterns.
5. Because of the dangerous acid rain, trees’s leaves are damaged.

* Radioactive pollution is very dangerous. It can cause abnormal growth.
   * Viết lại: Since radioactive pollution is very dangerous, it can cause abnormal growth. (Vì ô nhiễm phóng xạ rất nguy hiểm nên nó có thể gây ra sự phát triển bất thường.)
 * We did not go to school. It rained heavily.
   * Viết lại: We did not go to school because it rained heavily. (Chúng tôi đã không đi học vì trời mưa rất lớn.)
 * I don't have much money now, but I want to buy a new computer.
   * Viết lại: Although I don't have much money now, I want to buy a new computer. (Mặc dù bây giờ tôi không có nhiều tiền nhưng tôi muốn mua một chiếc máy tính mới.)
 * Light pollution happens. There is a change in animals' living patterns.
   * Viết lại: If there is light pollution, there is a change in animals' living patterns. (Nếu có ô nhiễm ánh sáng, thì sẽ có sự thay đổi trong các mô hình sống của động vật.)
 * Acid rain is dangerous. Trees' leaves are damaged.
   * Viết lại: Trees' leaves are damaged because of acid rain. (Lá cây bị hư hại vì mưa axit.)