1 Complete the sentences from the text on page 34. Then choose the correct words in rules a-c. 1 Animals becoming extinct. We 2 killing all these animals directly. Our pollution ? — changing the climate. RULES a We use the present continuous to talk about things happening now / habits and routines. b We use the verb do / be to form the present continuous. c We add-ing / -ed to the main verb in the present continuous.​