1. If you want to save electricity you should turn off your computer when you don't use it
2. No river in the world is longer than the Nile
3. We might visit Japan in the future
4. People stop using so much energy because they want to save the environment
5. my brother is a fast runner
6. What will you do if you see a used can in the road?
7. Nga's favorite sport is badminton