The changes in our chemistry lab will cost quite a lot, ____ they will save us money in the long run.
| A．or | B．since | C．for | D．but |
President Obama spoke of Mandela last night at the White House,the late South African leader man who took history in his hands..
| A．described...as | B．to describe...as |
| C．describing...as | D．describe...as |
The room is in a terrible mess; it _______ cleaned.
| A．can’t have been | B．shouldn’t have been |
| C．mustn’t have been | D．wouldn’t have been |
--- Where is your new home now?
--- In the new developed zone. But I ______ downtown for five years.
| A．lived | B．had lived |
| C．have lived | D．was living |
Most educators believe a challenging situation can often _______ the best qualities of a person.
| A．take out | B．turn out |
| C．work out | D．bring out |
Every time I fail, my father will always tell me “If your dream is big enough, the facts don’t ______.”
| A．cost | B．mean | C．value | D．count |