单项选择题

Holocene ______.

A．ended about 11,000 years ago.
B．is an existing geologic time period.
C．is the end of the Pleistocene epoch.
D．is an epoch of cool glacial and warmer interglacial periods.
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单项选择题
Which of the following statements is TRUE according to the passage
A．96 percent of the earth's surface is covered by ice.
B．Over 10 million square miles of the earth's surface axe covered by ice now.
C．Almost all of the ice sheets covering the land and glaciers in the mountains have been hidden.
D．Most of the ice on the earth's surface is located in Antarctic and Greenland for the time being.
单项选择题
What can be inferred from the passage
A．The climate of earth has fluctuated quite a bit over the last 4. 6 billion years.
B．An increase in the earth's temperature will have major consequences for all life on this planet.
C．The information we have got makes us unable to explain the global warming completely.
D．The Pleistocene began about t. 8 million years ago.
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