________he will come to help us is not clear.
| A．That | B．Whether | C．Either | D．What |
. His _____of the aeroplane was correct in every detail and could really fly.
| A．shape | B．pattern | C．design | D．model |
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 |