单项选择题

If ________, this plant yield his profits.

A．managing properly
B．not managing well
C．managed not orderly
D．not well managed
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单项选择题
Fat reserves are like bank accounts ________ in the winter when food supplies are limited.
A．to deposit
B．to be assembled
C．to set aside
D．to be drawn on
单项选择题
metal must be hammered and cooled rapidly to ________ internal stress caused by heating.
A．retain
B．release
C．relieve
D．replace
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