单项选择题

Unlike the common cold, flu tends to start abruptly.

A．mysteriously
B．seasonally
C．repeatedly
D．suddenly
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单项选择题
Poor children should not be deprived of the opportunity to participate in sports whenever possible.
A．denied
B．retreated
C．oppressed
D．refused
单项选择题
Two events have highlighted the tensions in recent years.
A．extended
B．emphasized
C．distorted
D．illustrated
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