[单项选择]Unlike competitive running , race walkers must always keep some portion of their feet in contact with the ground（）.
A. run
B. runner
C. runners
D. running race

[单项选择]Unlike competitive running , race walkers must always keep some portion of their feet in contact with the ground（）.
A. run
B. runner
C. runners
D. running race

[单项选择]Unlike competitive running, race walkers must always keep some portion of their feet in contact with the ground（）.
A. run
B. runner
C. runners
D. running race

[单项选择]Unlike science, progress in technology must be measured in terms of the human factor. Technology must be our slave and ______.
A. not the reverse
B. not the version
C. not the same
D. not the prejudice

[单项选择]Unlike a judge, who must act alone, a jury discusses a case and then reaches its decision as a group, thus minimizing the effect of ______ bias.
A. legal
B. professional
C. individual
D. unexpected

[单项选择]We have a high regard for Mr. Smith because he always _______ his principles.
A. stands up to
B. lives up to
C. puts up for
D. keeps up with

[单项选择]The ___________ from childhood to adulthood is always a critical time for everybody.
A. conversion
B. transition
C. turnover
D. transformation

[单项选择]

Unlike their American or European counterparts, car salesmen in Japan work hard to get a buyer. Instead of lying lazily around showrooms waiting for customers to drop by, many Japanese car salesmen still go out to get them. They walk wearily along the streets selling cars door-to-door. New customers are hunted with fruit and cakes on their birth- days. But life is getting tough, and not just because new-car sales are falling.
With more Japanese women(who often control the household budget) going out to work, the salesmen increasingly find nobody at home when they call. That means another visit in the evening or at the weekend. Then they face an extra problem: more people, especially the young, prefer to choose a new car from a showroom where they can compare different models.
Even as late as the mid-1980s some 90 percent of new cars were sold door-to-door. In some rural areas most new cars are still sold this way. But in the big cities more than half the new cars
A. they sell cars door-to-door
B. they buy presents for their customers
C. they enjoy themselves in recreation centers
D. they go out to do market researches

[单项选择]Unlike their seniors who remember a world without TV, they are as ______ in sounds and imager as in the printed word, and as often as not, prefer to do business that way.
A. literary
B. literate
C. literal
D. literacy

[单项选择]Unlike the earlier linguists, modern linguists tend to ______.


A. attempt to continue the standardization of the language
B. evaluate language practices in terms of current speech rather than standards or proper patterns
C. be more concerned about the improvement of the language than its analysis or history
D. be more aware of the rules of the language usage

[单项选择]Unlike photocopies of books, the digital copies are virtually ______ in quality to the original.


A. similar
B. identical
C. resembling
D. alike

[单项选择]Unlike gases, liquids are difficult to compress because there is practically no free space between molecules.


A. In contrast to
B. Similar to
C. More to
D. Just as