《英语口语 一语千说》第八篇 商业信函 01概述，02引言部分
2010-12-25来源:和谐英语
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概述
一、 词组句型
信函（引言部分）
1. 词组句型
收信
receive a letter, hear from
sentence patterns:
Yesterday I recieved a letter from your company.
I heard from you the day before yesterday.
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