In the future I am going to be an inventor．This winter holiday I don't want to go out to play．I want to ____something myself at home．I want to help old people____a light and folding bike．They ride it to the ____，then folding it and put it in the bag．After buying some things they can ride it and carry their things to go ____．They are not tired．I think if they see it，they must be very ____．

安徽历史悠久，人文荟萃。
(1)战国时期，思想家____ 痛恨“窃钩者诛，窃国者为诸侯”的不公平社会现象。
(2)北宋____ 提出了整顿吏治的主张，是历史上著名的清官。
(3)清朝时期，____ 负责全国经济工作，是马克思在《资本论》中唯一提到的中国人。