. Only when you ______ what you have learned to practice ______ say you have made it.
| A．adapt; you can | B．apply; can you | C．use; you can | D．adopt; can you |
_____ the majority of people you will meet when travelling are sure to be friendly, there are dangers-theft being the most common.
| A．Since | B．Unless | C．While | D．Once |
Water is the most widely used resource in ______ industry, and plays ______ major role in energy production.
| A．不填; a | B．the; a | C．an; 不填 | D．an; the |
The latest major disaster that occurred in Zhejiang paralyzed traffic, caused blackouts and ______ water supplies for days.
| A．cut down | B．cut off | C．cut up | D．cut out |
Children of divorced parents ______ have difficulty in forming stable relationships themselves.
| A．will | B．should | C．may | D．could |
—I slipped on the stairs. I think my arm is broken.
—Oh! I ______ .
| A．don’t hope so | B．hope not | C．hope not so | D．don’t hope |