单项选择题

Had the explosion broken out, the passengers in the plane should have been killed, for it was ______ timed with the plane's take-off.

A．spontaneously
B．instantaneously
C．simultaneously
D．conscientiously
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The press demands that politicians ______ the sources of their income.
A．betray
B．conceal
C．disclose
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He was a member of the Hillary ______ that conquered Mount Everest.
A．mission
B．invasion
C．experiment
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