单项选择题

The continual______ in temperature make it impossible for me to decide what to wear.

A．fluctuations
B．transformations
C．transmissions
D．recreations
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单项选择题
Rumors are everywhere, spreading fear, damaging reputations, and turning calm situations into______ ones.
A．turbulent
B．tragic
C．vulnerable
D．suspicious
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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