All flights______ because of the air traffic control, the passengers had to wait in the hall.
| A．were put off | B．having put off |
| C．having been put off | D．have been put off |
The policeman asked ________ with the old women.
| A．what the matter was | B．what was the matter | C．what wrong is | D．what is wrong |
21st Century is ______ a newspaper; it helps us know a lot about the world.
| A．more than | B．no more than | C．not more than | D．no less than |
Rather than_____ on a crowded bus , he always prefers______ a bicycle.
| A．ride ; ride | B．riding ; ride | C．ride ; to ride | D．to ride ; riding |
My plane at 8:30 am, so Ihome at 8:00 tomorrow morning.
| A．leaves; leave | B．leaves; am leaving |
| C．is leaving; am leaving | D．is leaving; leave |
The number of people present at the meeting ________ about 1000, a large number of whom ________ experts from abroad.
| A．was; was | B．were; were | C．was; were | D．were; was |