"Hello!Where are you going? " I said to a stranger. He said, "We are going to another planet where we can live." "Can''t we live on the earth any more? " "Yes. The environment is so bad hat we can '' t live on it now. Would you like to have a look at the earth? Follow me." So we began our travel around the earth.

"Look! What''s that? " I asked him. "Where? The black one? That''s a river." "A river! I remember the river is white and clean." "Ha ha! " he laughed, 44lt was white and clean before but now it''s black because of the heavy pollution." "How terrible! " We went about our travel. Suddenly a strong wind blew. "Be careful! The sand storm is coming. Into the cave! Be quick! " I followed him into the cave. The storm was so strong that the plastic bags were flying everywhere. "Why is there a cave here? " I wondered. "Because more and more trees are cut down, nothing could resist the strong wind except the caves." I felt more terrible. At last, the storm passed by. We went out of the cave. Suddenly a strange beast was coming at me. "Run away quickly! " The man shouted to me. But I can''t move my feet because there was a river in front of me. "Help ! Help ! "

I woke up. It was only a dream. How terrible!