The history of African—Americans during the past 400 years is traditionally narrated【C1】______an ongoing struggle against【C2】___

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问题     The history of African—Americans during the past 400 years is traditionally narrated【C1】______an ongoing struggle against【C2】______and indifference on the part of the American mainstream, and a struggle charted as an upward movement is【C3】______toward ever more justice and opportunity.
    Technology in and of itself is not at fault; it’s much too simple to say that gunpowder or agricultural machinery or fiber optics【C4】______been the enemy of an entire group of people.A certain machine is put【C5】______work in a certain way—the purpose【C6】______which it was designed.The people who design the machines are not intent on unleashing chaos; they are usually trying to accomplish a task more quickly, cleanly, or cheaply,【C7】______the imperative of innovation and efficiency (that has ruled Western civilization since the Renaissance.
    Mastery of technology is second only【C8】______money as the true measure of accomplishment in this country,and it is very likely that by【C9】______this under-representation in the technological realm, and by not questioning and examining the folkways that have ,【C10】______it,blacks are allowing themselves to be kept out of the mainstream once again.
【C4】

选项 A、have
B、to have
C、has
D、to has

答案C

解析 谓语动词应与主语保持一致。根据就近原则,因为主语是“fiber optics”,所以选用单数形式“has”。
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