单项选择题

When did man begin to explore the Antarctic

A．About 100 years ago.
B．In this century.
C．At the beginning of the 19th century.
D．In 1798.
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单项选择题
What is planned for the continent
A．Building dams along the coasts.
B．Setting up several summer resorts along the coasts.
C．Mapping the coast and the whole territory.
D．Setting up permanent bases on the coasts.
单项选择题
We get the impression that the writer of this article ______.
A．bitterly criticizes the writing style of e-mail
B．is in favor of the writing style of email
C．does not express explicitly his own attitude towards the writing style of email
D．is strongly against the substandard writing style of e-mail
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