It () when I （）in the country.a happened;was living b had happened;lived c happened;had livedd was happening;lived

It () when I （）in the country.a happened;was living b had happened;lived c happened;had livedd was happening;lived
It () when I （）in the country.
a happened;was living b had happened;lived c happened;had lived
d was happening;lived

It () when I （）in the country.a happened;was living b had happened;lived c happened;had livedd was happening;lived
选A.
happen是非延续性动词,不能用进行时态,所以D错了
BC选项用过去完成时没有理由,过去完成时用于在一个过去的事件之前发生的事.

A吧，这件事发生在当我还住在乡下的时候，开头明显的过去式，后面是过去进行时~~~~讲述故事时常有的句型

我觉得应该选A。