The uniform makes us look like a bunch of clones, especially _______ we are doing morning exercise in the playground.
| A．since | B．which | C．As | D．when |
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 |
. 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 |