W: This is a good spot. Let’s stop and have our picnic next to the river. - M: Good idea. Walking always makes me hungry. I’m ready for lunch., W: We can sit here on the grass. Oh no! Someone forgot to throw these empty paper bags away. There is litter everywhere! - M: Why do people always leave litter around? It’s not a nice thing to do. It spoils other people’s picnics., W: I think they are lazy. Or maybe they just don’t care. Look, there are some empty cans and glass bottles under that tree, too. - M: People should clean up before they leave, and not leave litter lying around., W: That’s right. Well, after our picnic, let’s pick up all the litter we can and take it out of here. - M: OK! And next week, let’s come back with friends and pick up some more.,

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