Trắc nghiệm: Mark the letter A B C or D on your answer sheet to indicate the word whose underlined part,Mark the letter A. B. C or D on your answer sheet to indicate the word whose underlined part,Mark the letter A B C or D on your answer sheet to indicate the word whose underlined part,Mark the letter A. B. C. or D on your answer sheet to indicate the word whose underlined part,Mark the letter A. B. C. or D on your answer sheet to indicate the word whose underlined part.