Dear Daphna,

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Pardon me for not fulfilling my entire commitment to prepare the seventh writing assignment on time! I wouldn't lie to you by telling you stories that my computer had collapsed, but I want you to know that I didn't mean to disdain this assignment! I deeply apologize and I hope you would accept my sincere apology.
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Michal :(

No need for such an apology. I know you. This could happen to anyone, including me. So, keep up your great work and don't feel too bad about it.

Daphna.