Bài 13:

1. A. will be taught
2. B. be called
3. C. will be calling
4. C. will look
5. C. won't happen
6. A. at this time
7. C. with
8. A. be cooked
9. A. be located
10. A. will be finished

Bài 14:

1. If we don't use fossil fuel efficiently, we will run out of it soon.
2. Solar power will be used as the main source of energy in many countries in the future.
3. Will many people attend this conference?
4. Our family will use the new type of bulb to save energy.
5. People will not be allowed to destroy rainforests anymore.
6. The government will put natural resources under protection.
7. Solar panels will be installed in many parts of the world.
8. My grandfather doesn't believe that electricity will be generated by the wind.