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Lucy spent three years _______ Chinese before she came to China.

A．on learning	B．to learn
C．learning	D．learn

試題分析：句意：Lucy在她來中國之前花了三年時間學習中文。Spend+時間/金錢（in）doing sth“話費時間/金錢做某事”，in可以省略。故選C。

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