单项选择题

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

A. perceived
B. conceived
C. deceived
D. retrieved
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单项选择题
There are several ______ to your plan.
A. alternatives
B. alternations
C. alternators
D. alternativeness
单项选择题
To the Portuguese, the dry salted cod is ______ pasta is to the Italians.
A. that
B. as
C. is
D. what
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