单项选择题

Businessmen make most of their income from profit () by producing and selling products.

A. earning
B. is earned
C. earn
D. earned

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单项选择题

()there was no enough evidence, most people thought he was guilty.

A. That
B. If
C. Unless
D. Although

单项选择题

She apologized()the mess she had made, but her parents were still very angry.

A. at
B. on
C. with
D. for

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