— My computer _______ start, no matter how hard I try.
— It might have crashed.
| A．won’t | B．shouldn’t | C．mustn’t | D．wouldn’t |
. The magician picked several persons from the audience and asked them to help him with the performance.
| A．by accident | B．on occasion |
| C．at random | D．on an average |
. 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 |