人们文化素养的核心和标志是[ ]

A．文化水平

B．文明程度

C．世界观、人生观和价值观

D．科学文化素养

______ for the fact that his father is general manager of the company, he would never get the job.

A．Had it not been

B．Were it not

C．Had not it been

D．Were not it