Put the verbs in the correct form: 1. If there were more trees in this area, the air (be)________________fresher 2. Global warming (not happen) ______________ if there weren’t too much carbon dioxide in the atmosphere. 3. If people (stop)_______________ digging the street, there wouldn’t be noise pollution in this area. 4. If I (be)_________________ the president, I (remove) all the factories out of the city. 5. If I spoke English, my job (be) ___________________ a lot easier. mọi người không cần chép đề đâu!