1. Student should turn off light before leaving the class

2. Children are very interested in robots

3. My future house will have a beautilful sea view.

4. If the river is polluted, the fish will die

5. Tokyo is one of the world's most crowded and biggest cities 

6. The Seafood is delicious and cheap in Quy Nhonw

7. Tomorrow we are going on a trip along the Huong river

8. Our future houses will use energy from the sun

9. If you burn rubbish, you will produce harmful smoke

10. Today, robots aren't very popular because they are too expensive

Students should turn off the light before leaving class 

Children are very interested in robots

Future, my house will have a sea view 

If the river is polluted, the fish will die

Tokyo is most biggest and crowded cities of the world 

The seafood in Quy Nhon is cheap and delicious 

We are going on a trip along the Huong river 

Future, our houses will use energy from the sun