Fill in the blanks

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1. We should save ........... resources.
2. People in the country are very open and ...........
3. Air ............ is a big problem in the city.
4. Her father soon died of a ........... heart.
5. Every week, there are two .............. from Ha Noi to Nha Trang.
6. We are waiting for the .......... of his plane.
7. Bell ........... demonstrated his invention.
8. Children need to have a good ........... of her teacher, she decided to study law.
9. Because of the ........... (encourage)
10. Some of my ........... (relate)