单项选择题

The two delegates had an in-depth exchange of views on how to enhance their cooperation ______.

A．ethical
B．bilateral
C．mandatory
D．subsidiary
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单项选择题
Three weeks after the suicide bombing, the police were still hunting for bombers for they believe more were ______.
A．on the verge
B．on the sly
C．on the spot
D．on the loose
单项选择题
When we credit the successful people with intelligence, physical strength or good luck, we are making excuses for ourselves because we fall ______ in all three.
A．rare
B．lacking
C．short
D．scarce
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