单项选择题

A．lighting
B．lighted
C．lit
D．lightening
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单项选择题
According to the author , what do most people realize______
A．Alternate sources of energy must be found
B．Car pools help to solve some of the energy problem
C．The automobile uses large amounts of gasoline
D．Great efforts have been made to solve the energy problem
单项选择题
The authors implication is that______
A．small cars use energy efficiently
B．anti-pollution devices on automobiles are not effective
C．Americans have to import a great quantity of gas each year
D．Americans waste energy
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