-We could have walked to the station, it was so near．-Yes．A taxi ________ at all necessary．A.wasn’tB.hadn’t beenC.wouldn’t beD.won’t be
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A解析该题由一暗含的虚拟条件引出对话，目的是考查考生对时态的掌握情况。We could have walked to the station, it was so near．是一个与过去事实相反的虚拟语气，言外之意是“如果我们知道车站这么近，就会步行去了，而出租车毫无必要”。但实际上并不知道，所以乘了出租车。