_____ you eat the correct foods _____ be able to keep fit and stay healthy.
| A．Only if; will you | B．Only if; you will | C．Unless; will you | D．Unless; you will |
The house ______as a reading room is under construction.
| A．used | B．being used |
| C．having been used | D．to be used |
He explained the question again to make it easier _______.
| A．to understand | B．understanding |
| C．understood | D．understand |
The scientist decided to ______his eyes to those who need them after his death.
| A．distribute | B．provide | C．donate | D．introduce |
The local villager gave such a(n)______description that all the tourists felt as if they were right on the scene.
| A．elegant | B．qualified | C．standard | D．vivid |
Tom is determined ______his classmates after many failures in school.
| A．get away with | B．give in to |
| C．keep up with | D．catch up with |