Unit 1 A Picnic by the River

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. W: Good idea!