—Lu does work hard. —Yeah. _____ of his time ______been spent on studies every day. A. Four-fifths; ...
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题目内容：
—Lu does work hard.
—Yeah. _____ of his time ______been spent on studies every day.
A. Four-fifths; has B. Four-fifths; have
C. Four-five; has D. Fourths-five; have
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