_____ it took Mrs. Roth one month to calculate what she can do now in one day. (A)Before ten years (B)Ten years ago (C)Ten years past (D)Before ten years age解释并翻译，谢谢
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选B十年前，Mrs.Roth需要花一个月的时间来计算她现在一天之内的计算量.
_____ it took Mrs. Roth one month to calculate what she can do now in one day. (A)Before ten years (B)Ten years ago (C)Ten years past (D)Before ten years age解释并翻译，谢谢
选B十年前，Mrs.Roth需要花一个月的时间来计算她现在一天之内的计算量.