We've been looking for cheap houses but haven't found ________ yet.
| A．one | B．other | C．it | D．that |
Innovation is a natural desire of the human mind to develop variety，__________ activity is involved.
| A．no matter when |
| B．however |
| C．whatever |
| D．no matter which |
The American girl has a good __________ of Chinese and can express herself freely in the language.
| A．item |
| B．series |
| C．command |
| D．usage |
-You're coughing badly, Martin. Why not give up smoking?
-Give up smoking? Easier said than done, Amy. Once you __________ the habit of smoking, it is very hard for you to __________.
| A．keep up; break it away |
| B．take up; drop it out |
| C．pick up; get rid of it |
| D．build up; do away with it |
Her father gave her the __________ of getting further education or starting to work.
| A．chance |
| B．opportunity |
| C．alternative |
| D．possibility |
-Have we __________ water?
-Yes. We'd better get some.
| A．run out |
| B．run out of |
| C．run into |
| D．run across |