单项选择题

The best title for this passage would be______.

A．Global Warming and People's Life
B．Global Warming, an Issue Worth Serious Consideration
C．Global Warming and Agriculture
D．Global Warming and Its Effect on Economy

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单项选择题

Professor Wong called for______.

A．building dams along the coasts
B．people's efforts to stop global warming
C．awareness at all levels to effectively face global warming
D．people's changing their lifestyle right :away

单项选择题

This passage is probably ______.

A．a news report or magazine article
B．a financial report of a certain department
C．a research paper of global temperature
D．a summary of a research