In the office I never seem to have time until after 5:30 pm, _____ many people have gone home.
| A．that | B．which |
| C．whose time | D．by which time |
Mark needs to learn Chinese __________ his company is opening a branch in Beijing.
| A．unless | B．until |
| C．although | D．since |
Nowadays the power of the wind is being __________ to generate electricity.
| A．harnessed | B．made |
| C．produced | D．exploited |
Winning the competition __________ his financial problems.
| A．was an end | B．came to an end |
| C．brought an end to | D．put an end |
It makes __________ to fight for your highest attainable goal.
| A．progress | B．efforts |
| C．sense | D．contributions |
It is the third time that she has won the race，__________ has surprised us all.
| A．that | B．where |
| C．which | D．what |