Complete the sentences using the words in brackets. 1. if i catch the bus at three (i / arrive / in time for the demonstration) 2. if we dont do something about global warming (the world / have / big problems in the future) 3. you wont pass your test (you / not study) 4. if we didnt protect the birds (they / become/ endangered) 5. would you buy organic food (it / be / cheaper) 6. you would use less electricity (you / use / low-energy bulbs)