Mark promised Susan that each morning and evening he would ride the bus with her, for as long as it took, until she got the hang of it.
马克答应苏珊每天早上和晚上跟她一起坐公交车，一直坐到苏珊熟悉坐公交车为止。
Mark promised Susan that each morning and evening he would ride the bus with her, for as long as it took, until she got the hang of it.
马克答应苏珊每天早上和晚上跟她一起坐公交车，一直坐到苏珊熟悉坐公交车为止。
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