.
Mary quickly closed the door of her room _______ her father could reach it to keep him out.
| A．before | B．when | C．as | D．while |
The open university was started in order to help those who _____ having a university education when they were young.
| A．stopped | B．failed | C．missed | D．ceased |
He has left his book here on _____, so that you can read it.
| A．purpose | B．intention | C．aim | D．meaning |
I remember her face but I cannot _____ where I met her.
| A．recall | B．remind | C．remember | D．remark |
The climbers _____ their ambition by reaching the summit of the mountain.
| A．obtained | B．sustained | C．maintained | D．realized |
It has always been the _____ of our firm to encourage workers to take part in social activities.
| A．plan | B．campaign | C．procedure | D．policy |