单项选择题

She remains confident and （）untroubled by our present problems.

A．indefinitely
B．infinitely
C．optimistically
D．seemingly

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单项选择题
The （）cycle of life and death is a subject of interest to scientists and philosophers alike.

A．incompatible
B．exceeding
C．instantaneous
D．eternal
单项选择题
Rumours are everywhere, spreading fear, damaging reputations, and turning calm situations into （）ones.

A．turbulent
B．tragic
C．vulnerable
D．suspicious
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