单项选择题

Call your doctor for advice if the ______ persist for more than a few days.

A．responses
B．signals
C．symptoms
D．reflections
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单项选择题
They claimed that they did not arrange the demonstration. It was absolutely _______.
A．spontaneous
B．simultaneous
C．synthetic
D．substantial
单项选择题
Not to show ill-feeling about his proposal, I ______ followed him down again in four or five minutes.
A．nevertheless
B．although
C．even though
D．yet
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