It may be 5 or 10 years __________ it is possible for people to find a space station on the moon.
| A．since | B．before | C．after | D．when |
Neighbors said they heard the man tell the woman that she couldn’t leave______ she gave back the money borrowed from him.
| A．unless | B．since | C．if | D．though |
The price of gold has jumped to______ new all-time high as debt worries in the US and ______ Europe continue to trouble the world.
| A．the; / | B．the; the | C．a; / | D．a; the |
Mo Yan, a Nobel Prize winner in Literature, grew up listening to folk tales that __ for centuries in his hometown.
| A．have been told | B．had been told | C．were told | D．have told |
___ great the demand to succeed, one should never abandon his moral and social consciousness.
| A．Now that | B．As if | C．Although | D．However |
____the problem, it follows that we must develop a plan of action.
| A．Recognizing | B．Having recognized | C．Recognized | D．Having recognizing |