Only when he was refused by the interviewer ____ the importance of knowing English.

A．was he fully aware of

B．he was fully aware of

C．was fully he aware of

D．he fully was aware of

事后控制不如事中控制，事中控制不如事前控制，可惜大多数事业经营者均未能______到这一点，等到错误的决策造成了重大的损失才如梦方醒，结果往往是请来了名气很大的“空降兵”也______。

A．意识 于事无补

B．体舍 无力回天

C．观察 无济于事

D．认识 一事无成