After the new technique was introduced, the factory produced _____ tractors in 1988 as the year before.
| A．as twice many | B．as many twice |
| C．twice as many | D．twice many as |
Don’t believe him. He is good at_________ all kinds of excuses.
| A．picking up | B．taking up | C．making up | D．bringing up |
Their performance was much better than_________.
| A．expected | B．it expected | C．expecting | D．it is expected |
Could I have a cigarette? I seem_________.
| A．to run out | B．to have run out |
| C．to have run out of | D．to have been run out |
Are you satisfied with the way_______ he explained the problem?
| A．which | B．by which | C．in that | D．/ |
The reason_______ so many people rushed to California was ______ another gold mine was found in California.
| A．that; because | B．why; that | C．that; why | D．why; because |