单项选择题
She went to the post office to mail a（）.
A.package
B.message
C.content
D.delivery
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A.useful
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C.worth
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The（）is a federal statute，enacted in 1890，that makes certain restraints of trade and monopolistic acts illegal.
A.Federal Trade Commission Act
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单项选择题
There were serious weaknesses, however, in the American economy in the（）.
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