单项选择题

Scientists first ______ the idea of the atomic bomb in the 1930s.

A．conserved
B．conceived
C．converted
D．contrived
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单项选择题
The crowd cheered out ______ when their beloved citizen appeared in his wheelchair.
A．homogeneously
B．simultaneously
C．spontaneously
D．harmoniously
单项选择题
A great scientist once said that success was two percent of ______ ,ninety--eight percent of perspiration .
A．inspiration
B．intuition
C．imagination
D．incentive
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