____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
| A．Put |
| B．Putting |
| C．Having put |
| D．Being put |
--- How can you be late for such an important conference?
--- Sorry! But my flight was ______ by fog.
| A．taken over | B．held up | C．turned down | D．handed out |
So serious ________ that even the best doctors failed to save his life.
| A．the man was injured | B．was the man injured |
| C．the man is injured | D．is the man injured |
Their work ______, all the experts went out for relaxation.
| A．to complete | B．completing | C．completed | D．had been completed |
The growing interest in ____ history is clearly evident in ____ number of people visiting museums and country houses.
| A．不填；不填 | B．不填；the | C．the; the | D．the; 不填 |
If English ______ included in the examinations, few students would choose it.
| A．weren’t | B．isn’t | C．hasn’t been | D．hadn’t been |