lz建议你下次别先把答案发出来.
好了,回归正题.这是反意疑问句的重点考点----否定前移.主语是第一人称,规则是:不看主句看从句,但因为否定前移了,所以为了做题方便把句子还原,I think that you did not judge your ability objectively when you applied for this job(当然,这是错误的,必须否定前移),根据前否后肯,所以用did you.如果主语非第一人称,如he/she/you,则看主句不看从句,如you don't believe she's been there,do you?
清楚了吗?