单项选择题

A full ______ of all the reasons for and against closing the railway has begun.

A．explosion
B．exploration
C．exploitation
D．explanation
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单项选择题
He was trained as a doctor but ______ to diplomacy.
A．converted
B．reverted
C．diverted
D．averted
单项选择题
The captain of the ship ______ the passengers that there was no danger.
A．insured
B．assured
C．ensured
D．secured
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