30．How long do you think it will be _____ we can find a new water source?
| A．after | B．before | C．when | D．Since |
The up-to-date information together with opportunities for hands-on learning makes the
world _______ in a completely new way .
| A．cut off | B．come to life | C．crowd in | D．lose face |
It was amazing that the army _______ its homeland against all enemies.
| A．defended | B．defeated | C．preserved | D．prevented |
What people like to eat is subjective, but ______ the northerners like dumplings while the southerners are fond of rice.
| A．by chance | B．in particular | C．at ease | D．in general |
Your are ______ to suffer from bad health if you keep smoking.
| A．likely | B．possible | C．probable | D．perhaps |
Nuclear science s
hould be developed to benefit people _______ harm them.
| A．more than | B．rather than | C．other than | D．less than |