The problem ______,she went away in a good mood.

问题描述:

The problem ______,she went away in a good mood.
A.had better solved B.being solved C.was solved D.solved

C
solve 解决,是及物动词,根据句意应该用被动语态,
she went away in a good mood.动词went 是过去式,所以“问题被解决”也要用过去时