Lacking rain, many river in Yunnan province have recently.
A. dried up
B. dried out
C. dried off
D. dried at
网友回答
(答案→)A. dried up
B. dried out
C. dried off
D. dried at
解析：句意：由于缺雨，云南的许多河流最近已经干枯了。dry up干枯，使)干透，(使)干涸，(使)枯竭，(水分)全干，(井等)干涸，逐渐枯萎；dry out变干，即把水分弄出去，用在把衣服晾干等。；dry off烘干，弄干；recently 是副词，前面不必加at，故排除D；根据句意故选A。