With the land of the city becoming rare, more and more high-rise buildings are under construction around the Jingmen City ___________ space.
| A．in search of | B．on behalf of |
| C．for lack of | D．in charge of |
If a ball is placed near a fire, the ball will _______.
| A．explore | B．extend | C．exchange | D．expand |
Find information in today’s world is not difficult. The _____ is how you can tell if the information is reliable or not.
| A．ability | B．competition | C．challenge | D．knowledge |
_____ to sunlight for too much time will do harm to one’s skin.
| A．Being exposed | B．Having exposed |
| C．Exposed | D．After being exposed |
To keep healthy, Professor Johnson________ cycling as a regular form of exercise after he retired.
| A．took up | B．caught on | C．carried out | D．made for |
Some experts say ____ birthrate of China, after the one-child policy is relaxed, can see ___ modest increase in future.
| A．the, a | B．a, a | C．a, / | D．the, / |