求助While pulling down the house,_______A a bag of gold was discoveredB there was a bag of gold discoveredC a bag of gold discoveredD the farmer discovered a bag of这是要考你什么

考的是状语从句，前后句子在逻辑上必须是同一个主语，比如pulling down the house的主语肯定也必须是The farmer,其他三个都不行。这种类型都可以这样考虑

While pulling down the house,_______ 。。。
A a bag of gold was discovered
B there was a bag of gold discovered
C a bag of gold discovered
D the farmer discovered a bag of
选D
问题一：这是要考现在分词短语pulling down the house的【逻辑主语是人】，不可能是A,B,C选项的bag。
问题二：这道题
While pulling down the house, the farmer discovered a bag of 。。。= While he was pulling down the house, the farmer discovered a bag of 。。。

D
本题考查非谓语动词作状语,其实上午已回答过你了.要求其逻辑主语与主句主语一致,否则就需用独立主格结构.
本句中While pulling down the house的逻辑主语肯定是“人”,过排除A/B/C.
掌握规则,了解语境,分清成分是解题的必要途径.
确保正确,