What will our world be like in 2020? Maybe no one  (知道). Because we never know what will happen in the  (将来). But it's very interesting to make some  (预言).

    Water will become as expensive as oil (因为) many rivers will disappear. We will have to  (节约) water and pay more for  (清洁的) water.

    Students won't go to school. They will stay at home and study  (网上). Students from all over the world may study  (一起) on the Internet. And more  (机器人)will be around us. They will do lots of dangerous(危险的)  (家务) for people.