单项选择题

Helen was so persistent that her husband ______ at last.

A．conceded
B．converged
C．conceived
D．conferred
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单项选择题
The laser represents a true marriage between science and technology, the men who devised it were ______ engineers and physicists.
A．spontaneously
B．simultaneously
C．instantaneously
D．homogeneously
单项选择题
He was trained as a doctor but ______ to diplomacy.
A．converted
B．reverted
C．diverted
D．averted
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