1. In the USA, there are 50 ________ and six different times zones across the country. A. states B. nations C. towns D. countries 2. Air ________, together with littering, is causing many problems in our cities today. A. pollute B. pollution C. polluting D. polluted 3. The ________ buried the whole village while people were sleeping in their houses. A. mudslide B. tornado C. drought D. thunderstorm 4. ________ is closest to the North Pole. A. Australia B. Canada C. the USA D. New Zealand 5. ________ is in London. A. Trafalgar Square B. Times Square C. SkyTower D. Ayers Rock 6. A: “Our house was destroyed by the storm”. – B: “_________” A. Oh no! B. That’s great! C. That’s awesome!” D. How wonderful!