单项选择题

In the last few minutes the conversation has become seemingly ______ as if the discussion were of some minor domestic matter and not survival itself.

A．crucial
B．central
C．casual
D．causal
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单项选择题
The new technological revolution in American newspapers has brought increased ______ a wider range of publications and an expansion of newspaper jobs.
A．manipulation
B．reproduction
C．circulation
D．penetration
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