任务型阅读（本题共5小题，每小题2分，共10分）
Life in the future will be different from life today. Between then and now many changes will take place, but what will the changes be?
The population is growing fast. There will be many people in the world and most of them will live longer than people live now.
Computers will be much smaller and more useful, and there will be at least one in every home. And Computer Studies lessons will be one of the most important subjects in schools then.
People will work _______ hours than they do now and they will have _____ free time for sports, watching TV and travel. Traveling will be much cheaper and easier. And many more people will go to other countries for holidays.
There will be changes in our food, too. More land will be used for building new towns and houses for all the people. Then there will be less room for cows and sheep, so meat will be more expensive. Maybe no one will eat it every day. Instead they will eat more fruit and vegetables. Maybe people will be healthier.
Work in the future will be different, too. Dangerous and hard work will be done by robots. Because of this, many people will not have enough work to do. This will be a problem.
小题1:在文中空格处填上适当的词 _____________ ______________
小题2: 将划线句子译成汉语_________________________________________________
小题3:找出同义句: Every family will have one computer or more.
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小题4: 回答问题：What will be one of the most important subjects?
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小题5:找出或写出本文的主题句_________________________________________________
（3）请根据上述氮肥的保存方法，推测NH4Cl的性质之一是__________________________。