Amazon today unveiled Dash Buttons, an easy way for customers to【C1】______ select bulk goods【C2】______ an internet-connected but

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问题     Amazon today unveiled Dash Buttons, an easy way for customers to【C1】______ select bulk goods【C2】______ an internet-connected button, and yesterday【C3】______ Home Services, an on-demand installation and handyman service. Combined, they show that the e-commerce giant has a clear understanding of how the Internet-of-things will【C4】______ its business. And it isn’t going to be shy about capitalizing on connectivity to build its bottom line. Dash Buttons are an adaptation of Amazon’s【C5】______ -controlled Dash ordering system that lets people speak to order new【C6】______ items.
    So【C7】______ Amazon has is a retrofit strategy for connecting smart appliances to its e-commerce operations and a future-facing strategy for the coming flood of【C8】______ devices. And all of this is geared around making buying products from Amazon as easy as possible.
    The【C9】______ of one-button tasks are appealing,【C10】______ it could lead to a【C11】______ of packages ending up at people’s doors if Amazon doesn’t try to【C12】______ waste on its end, by grouping shipments together when possible. People on Twitter seem mostly【C13】______ about pets and small children playing with the Dash Buttons and ordering multiples of their Kraft Macaroni and Cheese boxes, although Amazon notes that【C14】______ the button is pressed more than once, the order doesn’t go【C15】______ on the second time, and you’ll get a smartphone notification about it.
    Amazon also recently launched Home Services, following up on last year’s opening of a home automation e-store devoted to connected gadgets for the home—many of which require a【C16】______ installer. So now Amazon can sell these devices along with the person who can install them. It also is【C17】______ on maintenance, via a network of service providers that it can call【C18】______ for its network of suppliers or for its own planned connected home play.
    With Dash, it’s【C19】______ an offensive play to【C20】______ up more sales as devices come online. With Amazon Home Services, it’s making a defensive play as other large companies try to become more vertically integrated.
【C7】

选项 A、that
B、which
C、what
D、when

答案C

解析 此句子的主干是______Amazon has is a retrofit strategy for…and a future-facing strategy for….可知______ Amazon has为句子的主语,并且连接词在句中有实际的意义,故排除that(that在引导的主语从句中没有实际意义,且后面接完整的句子)。其他两项不能引导主语从句。因此,选C.what。
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