.The river in the late summer so we could go across it easily.A. dried outB. dried upC.

问题补充：

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The river in the late summer, so we could go across it easily.

A. dried out

B. dried up

C. dried off

D. dried down

答案：

A. dried out

(答案→)B. dried up

C. dried off

D. dried down

解析：考查短语辨析。句意“那条河在夏末变干涸了，所以我们可以轻松地穿过它。”dry up“干涸，弄干”。故选B。