机会研究是进行( )之前的准备性调查研究。
A．投资机会研究
B．初步可行性研究
C．可行性研究
D．投资方向论证
参考答案：B
—Are you here on business?
—No, .This is my holiday.
A．with pleasure
B．a pleasure
C．for pleasure
D．It’s my pleasure
I regret to have not paid more attention to our English lessons at school.
A．not paying
B．not having paid
C．have not paid
D．not to have paid
