Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions from 30 to 33. I can't find the letter I received f

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions from 30 to 33.

I can't find the letter I received from my boss some days ago. I might have thrown them into the trash bin yesterday.