Under no circumstances that I would meet so many problems when I decided to take the job．

问题补充：

Under no circumstances that I would meet so many problems when I decided to take the job．

A. do I expected

B. have I expected

C. I expected

D. did I expect

答案：

A. do I expected

B. have I expected

C. I expected

(答案→)D. did I expect

解析：考查倒装结构。句中否定词Under no circumstances在句首，主句的主谓倒装，根据语境时态用一般过去时，选D。