Life in the present is quiet different from that in future. Pollution has became a serious promble in many cities. The air is so bad that we can't breathe outisde long time. And we can only stay at home. Many stuents have extra classer or reading to relax themselves.

With the delelopment of technology, I believe we will have a better life.

Scientists will invent an air-clean machine to make the air fresh. And we can study at home with the help of internet. What's more? We can play table tennis with robots or travell to space by spaceship.

I hope it will bacome true as soon as possible.