Having walked in the desert for several days we felt exhausted but we had to find a pool

问题补充：

Having walked in the desert for several days, we felt exhausted, but we had to find a pool before water in the bottle .

A. ran out of

B. ran away

C. ran out

D. ran off

答案：

A. ran out of

B. ran away

(答案→)C. ran out

D. ran off

解析：考查短语辨析。A用完，耗尽；B跑开；C用完，耗尽（没有被动语态）；D流失；句意：在沙漠里走了好几天，我们感觉很疲惫了。可是我们要在瓶里的水用完之前找到水塘。A项后面要接宾语。故C正确。