Tom kept silent about the accident _________ lose his job.

A．so not as to

B．in order not to

C．in order to not

D．not so as to

《供电监管办法》规定，对用户受电工程设计文件和有关资料审核的期限，自受理之日起，（）用户不超过8个工作日，（）不超过20个工作日。