VI. Fill in the missing letters.
1. The schoolchildren sowed some s................... , but they forgot to water them so they didn’t grow.
2. People don’t realise how important it is to conserve e.............. , so they do nothing about it.
3. You should take more e.............. because that’s the way of getting fit.
4. Many unique plants and animals wouldn’t have become e................... if people hadn’t cut down rainforests.
