Yunnan from serious drought since 2009, so it’s our duty to save water every day.
A. suffered
B. has been suffering
C. has been suffered
D. have been suffering
网友回答
A. suffered
(答案→)B. has been suffering
C. has been suffered
D. have been suffering
解析：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。