Be _____we can' t expect an absolute freedom of expression.
| A．confident | B．creative | C．grateful | D．reasonable |
Experts say walking is one of the best ways for a person to _____ healthy.
| A．preserve | B．stay | C．maintain | D．reserve |
. Jack almost fell off the cliff, but managed to _____ until help came.
| A．keep on | B．catch on | C．count on | D．hang on |
If you _____ your demand, then maybe you will have more chance of getting what you want.
| A．conduct | B．dismiss | C．grant | D．moderate |
. 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 |