14. fill in the gaps (1–5) with given words (a–f). there is one extra variant (a–f) you do not have to use. 1) it’s important to …paper so we can save trees. a) pollute 2) water is vitally important for life so don’t … it! b) cut down 3) never …litter in the street, take it to the bin. c) waste 4) big factories may … wide areas around them. d) drop 5) every year large areas of forest are being … for different purposes. e) clean up f) recycle