生命的主要意义在于对社会的贡献和时间的长短。（   ）

“十一”过后，我校开始使用冬季作息时间，下午上学时间由14：40改为14：10，放学时间也提前到了17：30．而此时我国某城市的中学仍保持下午15：50上学，19：10放学的作息时间．据此回答下题．

    I think that the world will be an easy place to live in. We1have machines and robots and they will2us do all the3jobs, and we don't have to do things4washing dishes and5the beds, though we won't have any dishes at all. Maybe we will just throw the dishes away after each meal. I6that doctors will be able to7us alive8a long time. I hope that when I am 80 years old, there9something that can keep me alive for1080 years, so I will live to be 160 years old.