I have caught a serious cold last week and the doctor asked me to stay in bed for a week since I was very weak and the weather was very cold these days. Therefore, I couldnt go to the library to get the necessary referential information which was needed for my paper. As a result of this, I have not started writing the paper yet and could not hand it in on time.

　　上周我得了重感冒，因为身体虚弱、天气寒冷，医生要求我卧床一周。因此，我不能去图书馆查找写论文必要的参考信息。结果是，我还没开始写论文，也就不能按时交了。

　　Fortunately I have finally fully recovered. I will finish the paper as soon as I can and try my best to hand in homework on time in the future.

　　幸运的是，我终于完全康复了。我会尽我所能尽快完成论文，并且今后尽力按时交作业。

　　Sincerely yours,

　　Li Ming

　　您真诚的学生

　　李明

　　3月15日

　　英语四级作文高分句型解析：

　　The paper which you have assigned to us last Monday was due this Friday, but to my regret, I havent even started it yet.您上周一布置给我们的论文是截止到这周五，但是我非常抱歉，我甚至还没开始写。

　　点评：这句话运用的是现在完成时态。这是由which引导的定语从句，修饰前面的The paper。此外在这句话中还要注意单词due的含义。

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