（题文） – Do you think Sonia will pass the math exam?– Sure. She’s ________ so much

题干

（题文） – Do you think Sonia will pass the math exam?
– Sure. She’s ________ so much time on it.
A. cost B. paid C. spent

上一题下一题 0.85难度单选题更新时间:2014-07-02 11:23:13

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