When did Alibaba begin to sell everything at half price on taobao.com on Nov. 11th.? In 2007. In 2008. In 2009.

科目名称：理工英语1

试卷号：23894

题型：单选题

题目：When did Alibaba begin to sell everything at half price on taobao.com on Nov. 11th.? In 2007. In 2008. In 2009.

选项：In 2007. In 2008. In 2009.

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答案：In 2009.