单项选择题

Questions 8 to 10 are based on the following news from the VOA. At the end of the news item , you will be given 10 seconds to answer each question. Now listen to the news. How has Weihenmeyer climbed mountains

A．He has climbed mountains using a stick.
B．He has climbed mountains riding a horse.
C．He has climbed mountains supported by a guider.
D．He has climbed mountains using a system he devised himsel
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单项选择题
Which of the following statement is true according to the passage
A．35% of technical reports published in scientific journals are written by Scientists’ doing their research in America.
B．35% of all scientific journals are issued by American scientific societies.
C．35% of all scientists come from America.
D．35 % of all scientists are doing research at American institutions.
单项选择题
The writer argues that a system of social insurance should ______.
A．provide benefits for the sick, old and unemployed
B．encourage people to take on more social obligations
C．guarantee everyone the right of employment to support their families
D．provide everyone with the right to a minimum subsistence for a certain period
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