A. assembly     B. conference C. session  

10. To survive in the intense trade competition between countries, we must     the qualities and varieties of products we make to world market demand.    

A. improve      B. enhance        C. gear      

11.An important property of a scientific theory is its ability to     further research and further thinking about a particular topic.  

A. advocate     B. arouse C. stimulate

12. Language, culture, and personality may be considered      of each other in thought, but they are inseparable in fact.

A. independent        B. instinctive    C. separate     

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