All theories（ ） from practice and in turn serve practice.
A.originate B.restrain C.modify D.reflect
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All theories（ ） from practice and in turn serve practice.
Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many（1） .The simple（2 ）for this is that there are more different ways of looking at things（3 ）in the first kind of society. There are more ideas, more disagreements （4 ）interest, and more groups and organizations（5） different beliefs. In （6） , there is usually a greater worldly interest and greater tolerance in（7） societies. All these factors tend to promote social change by （8） more areas of life to decision. In a simple-racial （9 ） , there are （10） occasions for people to see the need or the opportunity for （11） because everything seems to be the same. And （12） conditions may not be satisfactory, they are at least customary and undisputed.
Social change is also likely to occur more frequently and（13） in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in the（14） basic and emotional aspects of society than in their opposites; in form rather than in（15） ; and in elements that are （16） to the culture rather than in strange elements. （17） , social change is easier if it is gradual. For example, it comes（18） readily in human relations on a continuous scale rather than one with sharp differences. This is one reason why change has （19） come more quickly to Black Americans as （20） to other American minorities, because of sharp difference between them and their white counterparts.
A. take down
B. turn down
C. cut down
D. set down
Everybody likes him. He is very （ ）with all his colleagues.
Meeting new people widened the young man’s（ ） .
Some 4, 000 private importers, exporters and wholesalers were nationalized and（ ）into a huge government monopoly, the State Trading Corp.
If no one takes the（ ）and plans for the trip, we will never leave home.
