单项选择题

The Food and Drug Administration is a federal agency responsible for （）laws designed to protect purity and safety of food and drugs.

A. enforcing
B. enhancing
C. endowing
D. entailing

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单项选择题
Auto makers are required to（）with the standards of exhaust control by improving their engines, styles, bumpers, brakes, steering wheels and seats.

A. conform
B. submit
C. comply
D. abide
单项选择题
Your job is not to make decisions but to （） the decisions we make.

A. complete
B. accomplish
C. implement
D. supplement
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