单项选择题

Which of the following best summarizes the passage

A．A Sudden Cure.
B．Two Patients.
C．Captain and Sailors.
D．A Difficult Voyage.
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单项选择题
Many countries are increasing their use of natural gas，wind and other forms of（）.

A．energy
B．source
C．power
D．material
单项选择题
80（）

A．from
B．for
C．to
D．about
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