问题描述：
—You speak very good French.—Thanks.I____French in Sichuan University for four years.
—You speak very good French.
—Thanks.I____French in Sichuan University for four years.
A.studied B.study C.was studying D.had studied
为什么不选D哪
—You speak very good French.
—Thanks.I____French in Sichuan University for four years.
A.studied B.study C.was studying D.had studied
为什么不选D哪
问题解答：
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