写作请阅读下面这封电子邮件我叫桑德拉，我住在牛津。
WritingRead the email. My name is Sandra and I live in Oxford.
否则，如果你在这一步需要更多的指导，请阅读下面的附加资料。
Otherwise review the additional resources below if you need more assistance with this step.
请阅读下面的关于课程的问题，选择唯一一个你认为最好的答案。
Please read the following questions about the course and select one(and only one)answer which fits your best .
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