单项选择题

From the passage we learn that ______.

A．an invention will not benefit the inventor unless it is reduced to commerical practice
B．products are actually inventions which were made a long time ago
C．it is much cheaper to buy an old patent than a new one
D．patent experts often recommend. patents to others by conducing a search through dead patents
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单项选择题
The passage is mainly about ______.
A．an approach to patents
B．the application for patents
C．the use of patents
D．the access to patents
单项选择题
Which of the following is NOT true according to the passage
A．The non-Chinese speaking interviewer might ask the questions which have already been asked by the Chinese and hence cause confusion.
B．It is more practicable to start an interview with a few fairly standard questions in English before switching to Chinese.
C．The best procedure of an interview would seem to be beginning in Cantonese and then testing English proficiency.
D．The Chinese interviewee often politely compliments the foreign interviewer if he or she speaks Cantonese even if it is not actually so good in the interview.
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