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Yunnan ______from serious drought since 2009, so it’s our duty to save water every day.
A.sufferedB.has been sufferingC.has been sufferedD.have been suffering
B

试题分析:考察时态。本题中的时间状语是since 2009,since通常与现在完成时连用。动词suffer from…患….;遭受..;句意:自从2009年以来云南省一直都遭受干旱,所以每天都节约用水是我们的责任。根据句意说明是从2009年以来,一直都是这样的情况,所以使用现在完成进行时。故B正确。
点评:时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态,在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。如since, so far等经常与现在完成时连用。在条件状语从句中用一般现在时代替将来时等等。
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