单项选择题

What’s the probable relationship between the two speakers

A．Boss and secretary.
B．Doctor and patient.
C．Teacher and student.
D．Engineer and technician.
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单项选择题
According to the speaker,
A．there are more ways to ensure blood supply.
B．more ways should be developed.
C．new rules should be developed.
D．more blood supply should be called for.
单项选择题
North Korea threatened on Tuesday to abandon the armistice because they
A．intended to have direct negotiations with the U. S.
B．prepared for the American preemptive attack.
C．wanted to take a decisive step for many years.
D．thought it possible the armistice would bind them.
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