单项选择题

Developments in international cooperation are often, it is suggested, the result of ______.

A．friendships formed by scholars at meetings
B．articles in learned journals
C．the work of international agencies
D．programs initiated by governments
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单项选择题
The writer claims that it is important for specialists to be able to travel because ______.
A．there are so many people working in similar fields
B．there is a lot of social unrest at universities
C．their follow experts are scattered round the world
D．their laboratories are in remote places
单项选择题
According to the passage, scholars and students are great travellers because ______.
A．standards are higher at foreign universities
B．their governments encourage them to travel
C．salaries and conditions are better abroad
D．they are eager for new knowledge
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