The number of people invited __________ fifty, but a number of them __________ absent for different reasons
| A．were ; was | B．was ; was | C．was ; were | D．were ; were |
______ people are standing outside the office. _____ people there is at least over 1,000.
| A．A number of; A number of | B．The number of; The number of |
| C．A number of; The number of | D．The number of; A number of |
You should always _____ your conclusion _____ careful research.
| A．depend; on | B．base; on | C．put; into | D．base; by |
We won’t give up ________ we should fail ten times.
| A．even if | B．unless | C．whether | D．Until |
—Could you turn the TV down a little bit?
—________. Is it disturbing you?
| A．Take it easy | B．Not a bit |
| C．I'm sorry | D．It depends |
He knows several languages, ______, he knows English and Japanese.
| A．such as | B．for example |
| C．that is | D．for an example |