Unit 3. WHAT’S YOUR KNOWLEDGE? » Стр.158 (4)

Стор.158 Впр.4 Complete the sentences. 1. If you don’t litter here will be cleaner around you. 2. If we reuse things, we will save our resources. 3. If people clean up after picnics, they will protect nature. 4. If people recycle old magazines and books, they will save trees. 5. If you turn off the lights when you leave a room you will reduce the use of electricity.