yesterday after school,I went to downtown with my sister,and we bought four pillows for our sofa.When we li,we taken bus.My sister and I seated on the back of the bus.Suddenly,there was a old man with a big old bag got on the bus.which was full of the empty cans.He wanted to move with that old bag,but the bag was too old to move.He moved one step,and some of the empty cans came out.The old man pick up a can,and he wanted to stuff it into his bag.The bag was too old,so it broken.In the end,there were a lot of empty cans in the bus.My sister and I were face to face and thinking about what did the old man going to do,what did we do for this old man,and if we gave our bag to him,there would be so hard to go home with four normal size pillows.after 3 minutes,we gave our bag to him ,and all of the passengers helped him to pick up the cans .