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Unit 4 Pygmalion Ⅰ. 语法填空 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。 An American inventor，Dean Kamen，says he has invented the worlds first selfbalancing individual transport vehicle，__1__ is called the Segway Human Transporter.The Segway looks like a long stick __2__ two wheels.The stick has handles for a person __3__(hold)．The wheels are connected by a platform.The person stands on the platform and holds __4__ handles.The vehicle moves forward or backward __5__ the person moves his body in that direction.The driver turns the handles __6__(go) left or right.The Segway has computers and gyroscope devices to make __7__ move and balance.It is powered by batteries that can be recharged in a few hours by __8__(use) an electric outlet.It can travel at a speed of nineteen kilometers per hour.It costs less than ten cents a day to operate.It does not produce pollution.Mister Kamen says the Segway could replace cars in __9__(crowd)city centers.He says it was designed to reduce pollution and solve other __10__(environment)problems in cities.However，it was not designed to travel on roads. 1．解析：关系代词which引导非限制性定语从句。 答案：which 2．解析：介词短语作定语，表示“带两个轮子”。 | 
