In most parts of the world, many students help their schools make ___1___ pollution. They join“environment clubs”. In an environment club, people work together to make our environment ___2___. Here are some things students often do.

　　No-garbage（无垃圾）lunches. How much do you ___3___ after lunch ? Environment clubs ask students ___4___ their lunches in bags that can ___5___ again. Every' week they will choose the classes those make ___6___ garbage and report them to the whole school.

　　No-car day. On a no-car day, nobody ___7___ to school in a car ? Not the students and not the teachers ! Cars give pollution to our air, so remember：Walk, jump, bike or run. Use your legs! It's ___8___ fun. ___9___ the water ! Did you know that some toilets can waste twenty to forty cubic（立方）meters of water an hour ? In a year, that would fill a small river ! In environment clubs, students mend those broken toilets. We love our environment. Let's work together___10___ it clean.