单项选择题

Modern appliances ______ us from a good deal of household work. For instance, the dryer frees us from hanging the laundry.

A．escape
B．benefit
C．liberate
D．comfort
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单项选择题
Tom ______ his new job with confidence.
A．set out
B．set off
C．set up
D．set about
单项选择题
The audience waited in ______ silence while their aged speaker searched among his note for the figures he could not remember.
A．respective
B．respect
C．respectful
D．respectable
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