10. Spot the mistakes in the following sentences and correct them.

1. He's been studying for days, isn't he?

2. If the battery is removed from the cell phone, the phone turn off.

3. It's no use making up an excuse in this situation, isn't it?

4. When temperature rises, ice doesn't melts.

5. He thinks the issue of climate change is an unsoluble problem.

6. In many countries, disrenewable energy is not highly encouraged for industrial activities and manufacturing.

7. Nowadays, many companies focus on making environmental friendly products to protect the environment.

8. Many city dwelers have the habit of using public transportation when they travel around the city.

9. Let's save money by using trains to go to work, won't you?

10. He often makes negative complaints about his life. Therefore, people say that he is too pesimistic.