With a question tag: I don’t think you judged your ability objec

With a question tag: I don’t think you judged your ability objectively when you applied for your present post,__________?
【正确答案】：did you
【题目解析】：宾语从句的反义疑问句，提问部分的助动词要根据宾语部分选用，从句部分为过去时，因此要借用did，提问部分的肯定形式与否定形式要根据主句的形式来判断，主句I don't think 为否定，因此提问部分要用肯定形式，did you