单项选择题

A．Survival strategies for extreme Antarctic cold.
B．Why inactive volcanoes become active.
C．The principal causes of global warming.
D．The effects of volcanoes on the Antarctic ice sheet.
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单项选择题
A．He no longer watches much television. B．He prefers the comedies from the sixties. C．Television comedies haven’t improved since the sixties. D．He hasn’t seen many of the old shows.
A．He no longer watches much television.
B．He prefers the comedies from the sixties.
C．Television comedies haven’t improved since the sixties.
D．He hasn’t seen many of the old shows.
单项选择题
A．To encourage people to participate in a club activity. B．To introduce a new kind of bicycle. C．To inform bicycle beginners about New Jersey’s traffic laws. D．To warn tourists about bicycling on the roadways.
A．To encourage people to participate in a club activity.
B．To introduce a new kind of bicycle.
C．To inform bicycle beginners about New Jersey’s traffic laws.
D．To warn tourists about bicycling on the roadways.
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