单项选择题

DEBT: OBLIGATION ::

A．patronage: loan
B．collateral: protection
C．paragraph: line
D．gratuity: note
E． bonus: liability
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单项选择题
Although some scientists ------- the credibility of the work of their assistants, they also ------- their experimental data.
A．take credit for ... appropriate
B．confirm... exploit
C．doubt... revisit
D．undermine... discard
E． suspect... utilize
单项选择题
His initial broadcasting success as a young man was due at least as much to his considerable professional ------- as it was to his father's broadcasting connections.
A．aplomb
B．uncertainty
C．hubris
D．seniority
E． nepotism
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