25．The rise of oil prices made scientists search for new energy resources ______ oil．
| A．replace | B．replacing | C．to replace | D．Replaced |
—It’s so cold! Why not close the door? —Sorry. It _________. I’ll have it repaired soon.
| A．won’t shut | B．won’t be shut | C．hasn’t shut | D．isn’t shut |
I am ashamed, sir, that I wasted the many hours __________ I should have studied in class.
| A．while | B．before | C．which | D．when |
—I’m afraid I have to give it up.
—Don’t be discouraged. Remember __________ sticks to his work will succeed one day.
| A．anyone | B．who | C．no matter who | D．whoever |
—What are you reading, Mike? —I’m not really reading, just _________ the pages.
| A．turning off | B．turning around |
| C．turning over | D．turning up |
—I ran into the back of a truck yesterday and damaged my car badly.
—I suppose you ___________ too fast.
| A．had driven | B．drove | C．were driving | D．have driven |