单项选择题

Those who let uncertainty ______ rarely achieve much.

A．turn them down
B．send them down
C．weigh them down
D．take them down
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单项选择题
There was so much ______ material in the essay that it was difficult to get the author's message.
A．exemplary
B．commonplace
C．superficial
D．impertinent
单项选择题
Such ______ as self-respect and industriousness merit the full backing of an employer.
A．advantages
B．traits
C．interests
D．shortcomings
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