VI. Read the passage and choose the best answers A, B, C or D We celebrated Earth Day in my city last week. The idea of this special day began in the 1960s __(1)__life was very different. Few people talked, or even thought, about the environment. Most people had no idea how dirty our air and water were. This attitude bothered Gaylord Nelson, __(2)__was a senator in the US government, and he had an idea. If people around the world knew the planet was in __(3)__, they might work harder to save it, so he just needed to get their attention. The first Earth Day was just in the United States but it led to events every year all around the world __(4)__ April 22nd or the nearest weekend, depending on where you are. Question 1: A. when B. that C. therefore D. how Question 2: A. which B. whose C. who D. that Question 3: A. dangerously B. endangered C. dangerous D. danger Question 4: A. on B. in C. at D. about