单项选择题

I have to give up my job in advertising because I can't keep up with the rapid _________ of work.

A．rate
B．pace
C．speed
D．velocity
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单项选择题
Every one who has visited the city agrees that it is _________ with life.
A．vibrant
B．violent
C．energetic
D．full
单项选择题
My mother can't _________ because she has rheumatism.
A．get on
B．get about
C．get through
D．get by
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