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
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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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