1. Polluted water can _______________ do harm to people’s health. (direct) 2. We should keep our environment ____________.

1. Polluted water can _______________ do harm to people’s health. (direct)
2. We should keep our environment ____________. (pollute)
3. According to the weather forecast, it will be _____________ tomorrow. (sun)
4. The machine will go into full _______________ in January 2022. (produce)
5. How many planets are there in our ________ system? (sun)
6. Energy-saving bulbs help _______________ save lots of money. (consume)
7. They’ve measured the car’s fuel _______________ (consume)
8. Remember to use energy more _______________ (efficiency)
9. ______________ are encouraged to complain about faulty goods. (consumption)
10. Energy _____________ includes searching for alternative fuels. (conserve)
11. They greeted their visitors with formal ___________. (polite)
12. Mary has very ____________ offered to help out with the food for the party. (kind)
13. As the world’s energy resources are limited, we must _______________ them. (conservation)
14. She _____________ refused his invitation. (polite)
15. “To_____________” means to remove trees or forests from a place. (forest)
16. Sulphur dioxide is one of several __________that are released into the atmosphere by coal-fired power stations. (pollute)
17. They wore a charm as a ______________ against evil spirits. (protect)
18. He is the president of an ______________ club in our city. (environment)
19. They voted in favor of the ____________ of smoking in public areas. (prohibit)
20. Jogging is a very ___________ form of exercise. (energy)