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【题目】Since 2008, China__________ a powerful high-speed railway network.

A.developB.developedC.has developedD.will develop

【答案】C

【解析】

句意:自从2008年,中国已经发展了一个强大的高速铁路网。

考查现在完成时,develop发展,动词原形;developed过去式;has developed现在完成时;will develop一般将来时。根据时间状语“Since 2008”可知,此句用现在完成时表达某一动作或状态从过去开始,一直延续至今。故选C

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