根据短文内容和所给中文提示，在空白处写出单词的正确形式。每空限填一词。

    What will life be like in 200 years? Teachers won't(写) on the blackboard with(粉笔) in the future. Students won't do their homework on(纸), and won't draw a line with a(尺子). At that time, every student will study(在……上) the computers. And at the weekend, students can go cycling(和) their friends—robots. That would be very(有趣的). There will be many(机器) on the farms, and they do lots of(工作). What about the climate (气候) then? The weather will be quite warm or even hot all year, with heavy(雨) and wind. That will bring people many problems.