Hitchbot
Have you ever seen a hitchhiker（搭便车的旅行者）standing by the side of a road？Now drivers in Canada might see（51） ______ unusual hitchhiker； a hitchhiking robot．
One of its inventors，David Harris Smith，has hitched across Canada three times．Smith and a friend，Frauke Zeller，have built Hitchbot because they wanted（52）（see） if people would stop and give the robot a lift and talk to it．The robot can chat about things it has learned，and about（53） ______ （it） trip．You might think it's a joke，（54） ______ Smith and Zeller's experiment has a serious point：can robots and people get along？
Hitchbot（55） ______ （begin） its journey in Nova Scotia in July．It has already completed a third of its 6，000-mile trip to Victoria．More than 57，000people are following its journey（56） ______ （close） on Facebook and Twitter，and travelers have posted lots of（57） ______ （photo） on the websites．Hitchbot has also done some shopping，eaten motor oil，and had fun with travelers．Nobody knows（58） ______ it will finish its journey．It might be（59） ______ （long） than expected，but Zeller and Smith want Hitch to get（60） ______ many rides as it can．It hasn't been in a self-driving car yet，but anything is possible!