---Jack, could you tell me _________?---Sure．In the post office on Green Road．A.where you bought the stampsB.where did you buy the stampsC.when you bought the stampsD.when did you buy the stamps
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A解析宾语从句宾语从句应用陈述语气，排除B和D。根据答语“In the post office on Green Road”，可知问句提问的是地点。故选A。