1. Antarctica is the coldest continent in the world.
2. Why don't we go out tonight?
3. John has seen that movie with his family many times.
4. If there is noiser pollution, people and animals will have hearing problems.
5. Peter stayed at home last night because he was ill.
6. This is the tallest building in this city.
7. Nam has taken part in english speaking club since 2000.
8. If she finishes without any mistakes, she will start the next level.
9. Will robots be able to talk to people in the future?
10. I have seen that movie with my family many times.
11. If you use little paper , you will save more trees.
12. Is Tokyo the most expensive city in the world?