30. Having introduced the advanced scientific methods, the factory turned out ______ in 2006 as a year before.
| A．as many as four times machines | B．four times machines as many |
| C．four times as many machines as | D．four times as many machines |
The firemen managed to _____ the fire in time.
| A．extinguish | B．prevent | C．suppress | D．ruin |
It was a great _____ for him to be pleasant to people he didn’t like.
| A．attempt | B．trouble | C．power | D．effort |
. He has impressed his employers considerably and _____ he is soon to be promoted.
| A．eventually | B．yet | C．finally | D．accordingly |
. I could just see a car in the distance, but I couldn't _____ what color it was.
| A．look out | B．make out | C．get across | D．take after |
The worker agreed to _____ the strike if the company would satisfy their demands.
| A．call for | B．call forth | C．call off | D．call up |