While building a tunnel through the mountain, _____.
| A．an underground lake was discovered | B．workers discovered an underground lake |
| C．there was an underground lake discovered | D．a lake was discovered underground |
Nobody can achieve anything of real significance _____ he works very hard.
| A．if | B．unless | C．meanwhile | D．as |
You have to balance the advantages of living in the country ______ the disadvantages.
| A．for | B．to | C．against | D．with |
The 30th Olympic Games, ______ between July 27 and August 12 in 2012, will take place in London.
| A．scheduling | B．to schedule |
| C．scheduled | D．to have scheduled |
______ healthy, with easy access to affordable medical care, is still a dream for many people, with medicine price ______ sharply.
| A．Keeping; rise | B．Keeping; rising |
| C．To keep; risen | D．Having kept; to rise |
If you ______ a fresh mind for an interview, be sure to have a good sleep the night before it.
| A．will have | B．have had | C．are having | D．are to have |