谁能帮我解决一道英语题目

题目

谁能帮我解决一道英语题目
_____ for a long time,most of the crops in this area died from lacking water.
A.Being no rain B.There was no rain C.To be no rain D.There being no rain
为什么选D不选A,还有,是不是A变成Having been no rain就对了?
前面状语的时态为什么不用考虑for a long time而用到完成时？

答案

前半句是名词性独立主格结构,表示原因.意思即是：There was no rain for a long time. Most of the crops in this area died from lacking water. 前后句的主语不相同,所以前半句不能省掉其主语there.故选 D .for a ...