The boy is always found______in reading books.
| A．to bury | B．burying | C．buried | D．buries |
. He ate what he could, and gave the _____ of the food to the birds.
| A．remain | B．uneaten | C．rest | D．part |
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 |