1. Travelling to the countryside is becoming  ......increasingly   ....       Popular nowadays ( increase)
2.we must use electricity ...economically... (economy)
3...Solar...energy is the best alternative source of energy( Sun)
4.some Volunteer ....conservationists. are cleaning up the beach(conserve)
5.a good body and love from our parents are the most...priceless..thing l have(price)
6.no doubt there will be a great ...... of food for the world’s population ( short)
7.i am ...extremely.... disappointed to know my children have not cleaned up all the trash (extrame)
8. White ao dai symbolizes the..purity.. of the girl students (pure)
9the lava in that volcano ....solidifies. as it cools (solid)
10.paper and plastics are...recycled.. materials (recycle)

#NOCOPY

1.increasingly                               

2.economic

3.sunny

5.proud

7.extremely

8.purell