单项选择题

By November 1973 oil supplies were critically low, creating the most __shortages of energy since World War II,

A．rigid
B．acute
C． dense
D．urgent
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I believe in the __ worth of the individual and in his right to hfe, liberty,and the pursuit of happiness.
A．superior
B．surplus
C． supreme
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Smoking also __ the heart and blood vessels.
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