They're supposed to recycle newspapers., , We might meet after school to pick up litter., , They're not supposed to recycle soda cans., , They might not use paper bags at this store., , I might stay home and do my homeworK, , We're supposed to use less electricity!, , He might forget to put cans in the recycling bin., , You're not supposed to put cans in there., , Are we supposed to recycle glass bottles?, , We might not have enough water later..

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