单项选择题

The best title of the passage can be _________.

A．Typical Oceans and Their Respective Features
B．The Causes of the Changes in Salinity of Ocean Water
C．Different Oceans Have Different Salinity
D．The Precipitation and Evaporation of Oceans
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单项选择题
A common language is necessary for some multi-lingual countries _________.
A．for both internal and international communications
B．for access to the development in other countries
C．for higher efficiency of the government and better life of die public
D．for wider communications among colonial nations
单项选择题
According to this passage, the English language might be used _________.
A．for only one reason that English is becoming an international language
B．mainly by people from the American continent and the European continent
C．as an official language in an international conference on the American culture
D．in science and technology as well as itl cultural and historical studies of all countries
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