单项选择题

Health care providers wish to improve their ______ through regular continuing education.

A. equivalence
B. competence
C. relevance
D. prevalence
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单项选择题
It was already dark ______ I got up from my seat and prepared to leave my office.
A. by the time
B. since the time
C. until the time
D. during the time
单项选择题
Although US new home sales begin to ______ speed, the rate is still near historical lows.
A. turn up
B. pick up
C. set up
D. break up
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