С, i) fill in: repair, switch, waste, paper, glass, packed, extinction, campaign, compost, endangered. 1.one man`s … is another man`s treasure. 2. you must … off the light when leave an empty room. 3. we have to protect rare animals from … . 4. try to … your gadget before you buy a new one. 5. … is made of wood. save the trees! 6. …can be recycled. 7. my teacher has started a recycling… at school. 8. make a … heap in the garden. 9. dolphins are … nowadays. 10.prepare … lunch in a reusable lunchbox. ii) fill in: could, have to, ought to, must, shouldn`t, don`t have to. 1. you … prepare your project works to the next lesson. 2. i can`t go out because i … finish writing my letter. 3. my friend … speak german from his childhood. 4. you… read this book . it`s for older people. 5. it`s sunday today so i… go to work. 6. the people … stop the destruction of the rainforests. iii) form negatives from the words in brackets. 1. some nature problems are (possible ) to solve. 2. smoking in public places is (legal) in our country now. 3. many plants and animals will soon (appear) . 4. this person is sometimes (responsible iv) fill in: in, from, of, away from, for, by, with, on. 1. glass is made … sand. 2. many animals are … danger. 3. the cat runs … a dog. 4. fill is a great fan … manchester united. 5. sprays are harmful … the environment. 6. many species are protected … law. 7. please be careful what you do … any waste water. 8. a lot of cars in russia run … petrol. v) put the adjectives in brackets into correct form. 1. jim is the (lazy) pupil in the class. 2. your armchair is (comfortable) than jane`s. 3. my new flat is (big) than the old. 4. that day was (happy) in my life because i met my love. 5. sam is (sociable) boy of all our friends.