单选题 From the first paragraph we can see that ______.

【正确答案】 D
【答案解析】[分析] 推理题。从文中可知1976年大本钟出现了问题,根据“…It was the first time for 20 years that Big Ben had been silent for so many hours…”可推断出从1956年以来兰直表珊艮好。所以D正确。