综合阅读。 There are many people who do jobs that help you. (1) Engineers know about math and science. They use what they know about math and science to build new things. Engineers help build almost everything we use. Some engineers make TVs sound good. (A)_____ Some also make old things work well for people. (2) Police officers work hard to keep towns and cities safe. They help the people when there are accidents. Police officers also try to stop accidents. They make sure that people don't break rules. (3) Firefighters put out fires in buildings, cars, and forests. If people are trapped (陷入) in burning buildings. firefighters can help them as soon as possible. Firefighters try to stop fires in forests before the fires get to towns. (4) People who pick up garbage (垃圾) also help keep towns and cities safe. If garbage is not picked up, people can get sick from germs (细菌). These people work day and night to keep us healthy and safe. 1. 文中 A 处掉了一句话，请选出合适的句子，放在横线上。 A. Some can help you keep fit. B. Some make computer games that are fun to play. C. Some keep money of stores safe. D. Some use computers to play games. 2. 请选出各段描述的人物，并填在横线上。 A. B. C. D. (1)__________________________________________________________ (2)__________________________________________________________ (3)__________________________________________________________ (4)__________________________________________________________ 3. Put the number of the right statements (叙述) in each line. Police officers: ______; Firefighters: ______ ①save people who are trapped in burning building ②try to stop accidents ③make sure people don' t break rules ④stop fires in forests before the fires spread quickly ⑤keep towns and cities clean 4. 'Building new things' is MAINLY about ______. A. math and science B. what engineers do C. building houses D. how engineers make TVs 5. 把本句子译成汉语： Police officers work hard to keep towns and cities safe. __________________________________________________________