单项选择题

There is always excitement at the Olympic Games when an athlete breaks a previous record of performance.

A. beats
B. matches
C. maintains
D. announces
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单项选择题
There is an abundant supply of cheap labor in this country.
A. a steady
B. a plentiful
C. an extra
D. a stable
单项选择题
Medicine depends on other fields for basic information, particularly some of their specialized branches.
A. conventionally
B. obviously
C. especially
D. inevitably
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