单项选择题

By a comparison between past problems and present ones the author draws attention to the ______.

A．importance of the energy crisis
B．hopelessness of the situation
C．differences between the past and the present
D．inadequacy of governments
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单项选择题
What suggestion does the author make in order to grasp this opportunity
A．Search for new energy sources.
B．Forbid motor transportation.
C．Accept a new life style.
D．Adopt a new form of invention.
单项选择题
It can be inferred from the passage that ______.
A．the energy crisis is similar to the natural disasters we had in the past
B．the problem of energy is the most serious problem our country is confronted with
C．the author is uninterested in the problems of our society
D．the author is particularly worried about the crises we are facing
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