单项选择题

There are about 260 million people who can speak ______.

A．English in its regional variety
B．English in its standard variety
C．English as a second language
D．English as a working language
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单项选择题
The Weddell Sea ______.
A．is a good example of increased salinity in freezing sea water
B．is much larger in area than the Arctic oceans
C．has a much lower salinity now than ever
D．has the denser water in its upper parts
单项选择题
According to this passage, the sea ______ is likely to have the lowest salinity.
A．in tropical areas
B．off Antarctica
C．of high rainfall
D．with abundant sunshine
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