根据写作要求，写出一篇作文。 Suppose you are Simon. You purchased a Sony digital camera from Amazon.com and found that there were scratches on the screen. You are writing to complain about it.

根据写作要求，写出一篇作文。 You are Susan. Your company will hold an opening ceremony for a new factory. You are asked to write an invitation letter to David， an important client of your company. The following information should he included：the reasons to invite him； the time for the event；the place for the event；early reply expected. 

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