单项选择题

Which of the following can be inferred from the passage （）

A．Few people will take drugs if they are allowed.
B．The United States will be easily defeated if its citizens are allowed to take drugs.
C．It is a general practice to forbid drugs in different countries.
D．A majority of people will become addict to drugs if they are allowed to take them.

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A.professor B.storm C.ordinary D.short

单项选择题

It can be concluded that （）.

A．raising the world’s temperature only a few degrees would not do much harm to life on earth.
B．lowering the world’s temperature merely a few degrees would lead major fanning areas to disaster.
C．almost no temperature variations have occurred over the past decade.
D．the world’s temperature will remain constant in the years to com