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

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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

单项选择题

Which of the following is the main idea of this passage

A．There are many different levels of English usage throughout the world.
B．English is becoming more and more widespread in the world.
C．The number of English speakers has been increasing in recent years.
D．English is used widely in science, technology and other fields.