摘要： -How do you think Mary managed to improve her French in such a short time? - 4 hours on it every day. A. Because of spending B. By spending C. Spent D. To spend
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How do you think Mary managed to improve her French in such a short time?
________ 4 hours on it every day.
[ ]
A．Because of spending
B．By spending
C．Spent
D．To spend
—How do you think Mary managed to improve her French in such a short time?
—________ 4 hours on it every day.
A．Because of spending
B．By spending
C．Spent
D．To spend
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