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
Two trucks were reported to have ______ head-on yesterday.
A．bumped
B．crashed
C．collided
D．struck
单项选择题
The reporter managed to get an ______ interview with the Prime Minister.
A．extinct
B．excluding
C．excessive
D．exclusive
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