The twins,______at birth,do not know each other .
| A．separated | B．being separated | C．having separated | D．having been separated |
If you don't want to set fire __________ the ship，__________ your cigarette.
| A．on; put out | B．to; put out |
| C．on; put off | D．to; go out |
-Is that hall big enough? We have at least 200 guests.
-Sure. That's a hall which can __________400 people.
| A．consist | B．admit |
| C．hold | D．accommodate |
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 |