完形填空。 In most parts of the world, many students help their schools make less pollution(污染). They join' 1 '. In a meaningful(有意义的)club, people work together 2 our environment clean. Here are some things students often do. No-garbage(废料,垃圾) lunches. How much do you throw away 3 lunch? Environment clubs ask students to bring their lunches in bags that can 4 again. Every week, they will choose the classes that make the least garbage and report them to the whole school. No-car day. On a no-car day, 5 comes to school in a car. Neither the students nor the teachers! Cars give pollution to the air(空气). 6 remember: walk, jump, bike or run. Use your legs! It's lots of fun. 7 the water! Did you know that some toilets(厕所)could 8 twenty to forty cubic(立方的)metres of water an hour? In a year, to your 9 , that would fill a small river! In environment clubs, students repair those broken toilets 10 . We love our environment. Let s work together and make it clean. (     )1. A.no-car day (     )2. A.make (     )3. A.since (     )4. A.use (     )5. A.somebody (     )6. A.So (     )7. A.Turn on (     )8. A.waste (     )9. A.surprise (     )10.A.their B.environment clubs B. B.until B.be used B.anybody B.And B.Turn up B.give B.surprised B.they C.new music groups C.to make C.before C.throw C.everybody C.But C.Turn off C.keep C.surprising C.them D.no-garbage lunches D.will make D.after D.be thrown D.nobody D.Or D.Turn down D.throw D.surprisingly D.themselves