John was a student at this university from 1999 to 2003, ________ he studied hard and was made chairman of the Students’ Union.
| A．during which | B．by which | C．during which time | D．by which time |
Our school motto reflects the importance we ______ to good manners, hard work and success.
| A．place | B．attach | C．pay | D．Turn |
It’s unwise to ______ you understand something when you don’t.
| A．speak up | B．find out |
| C．make out | D．make up |
For the citizens of the world’s poorest nations, the future ______ never arrive soon enough.
| A．must | B．should | C．may | D．Can |
All his hard work ______. He was admitted into one of the best universities.
| A．turned up | B．paid off | C．put off | D．turned out |
Junyan added that as a reporter she needed many different skills and ______ to learn new things.
| A．was constantly challenged | B．constantly challenged |
| C．was constantly challenging | D．had constantly challenged |