单项选择题

The manager gave her his ______ that the complaint would be investigated.

A．admission
B．allowance
C．assurance
D．insurance
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A year ago the firm had a ______ loss of 4. 3 million dollars or 20 cents a share after all necessary deduction.
单项选择题
Care should be taken to decrease the length of time that one is ______ loud continuous noise.
A．subjected to
B．filled with
C．associated with
D．attached to
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