单项选择题

The border incident led to the two countries' ______ diplomatic relations.

A．pulling off
B．breaking off
C．passing off
D．falling off
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单项选择题
Very few experts ______ with completely new answers to the world's economic problems.
A．come to
B．come round
C．come up
D．come on
单项选择题
As soon as the exam was over, the students all went their ______ ways.
A．homely'
B．perspective
C．respective
D．relative
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