单项选择题

More than two hundred years ago the United States （） from the British Empire and became an independent country.

A. got off
B. pulled down
C. broke away
D. dropped off

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单项选择题
8（）

A.explicit
B.implicit
C.conscious
D.unconscious
单项选择题
Cosmetics, rarely noted today for any dangerous properties, have been （）for serious health problems in the past.

A. responsibility
B. responsible
C. its responsibility
D. the responsible
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