单项选择题

单项选择题 Most of us go through life adding （） to knowledge, polishing a concept here or there, doing an experiment, contributing a few leaves or, if we are lucky, a twig to the tree of knowledge.

A.impartially
B.impassably
C.incrementally
D.melodiously

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单项选择题

The charitable aces of their boss used to be greatly praised by the people. However, ruthless company-downsizing drives and continued layoffs, coupled with rising pay for top managers, have made him look a good deal less （）.

A.discourteous
B.prudent
C.benevolent
D.obstinate

单项选择题

For us it is a big and dark secret; to （） it would be to jeopardize our future,‖ confessed an aviaphobe who is currently undergoing therapy.

A.divulge
B.recall
C.retain
D.duplicate

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