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    To help today’s customers make a choice, a company in New York a video trolley - a supermarket trolley with a video screen to display advertisement and price information. A. has invented B. had invented C. invents D. is inventing 【查看更多】

     

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    To help today’s customers make a choice, a company in New York _____a video trolley — a supermarket trolley with a video screen to display advertisement and price information.  

       A. has invented        B. had invented        C. invents            D. is inventing  

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    .
    To help today’s customers make a choice, a company in New York _____a video trolley — a supermarket trolley with a video screen to display advertisement and price information.  

    A．has inventedB．had inventedC．inventsD．is inventing

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