单项选择题

(Even if) automakers modify commercially produced cars to run (on) alternative (fuels), the cars won’t catch on in big way (when) drivers can fill them up at the gas station.

A．Even if
B．on
C．fuels
D．when
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单项选择题
The American dream is most ____________ during the periods of productivity and wealth generated by American capitalism.
A．plausible
B．patriotic
C．primitive
D．partial
单项选择题
Anyone with half an eye on the unemployment figures knew that the assertion about economic recovery ____________ just around the corner was untrue.
A．would be
B．to be
C．was
D．being
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