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Dear my Darling [이름],

Good evening! ^.^

Happy Tuesday evening! ^,^

I am glad that you continue finding time to check things about our classes.

Thank you for that! ^^

However, I hope I can do something for you to remember our classes even though you don\'t check the recorded files of our classes.

Anyway, that\'s all for now! ^^

Enjoy reading! ^^,

See you tomorrow! ^^.

... Teacher Paula ... ^.~

Dear my Teacher Paula,
>> CORRECT!

Good day.
>> CORRECT!

>> OR: Good day!

I usually record our class using my computer every day, and I move the mp3 file to my mobile phone after our class.
>> CORRECT!

However, I forgot to move it to my mobile phone, I could not review yesterday\'s class today.
>> CORRECT!

This morning, I went through my vocabulary note instead of reviewing recording file, but I noticed that I didn\'t remember the contents of last classes. 
>> This morning, I went through my vocabulary note instead of reviewing the recorded yesterday file, but I noticed that I didn\'t remember the contents of our last class. (RECORDING should be RECORDED. When you use recording as an adjective, it means that the file has the ability to record things. Recorded means that the file is saved.)

I suddenly felt frustrated and did self-reflection.
>> CORRECT!

I realized again just how hard learning a foreign language is
>> I realized again just how hard learning a foreign language is. (Don\'t forget to put proper punctuation marks at the end of your sentences.)

There is no choice but repeating that again and again.
>> CORRECT!

>> BETTER: There is not choice but to repeat that again and again.

Anyway, I hope both of us use our time preciously. ^^
>> CORRECT!

See you very soon.

>> CORRECT!

>> OR: See you very soon!