Mark the letter A, B, C, or D on your answer sheet...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction: Ernest Hemingway, he is seen as one of the greatest 20th century American novelistsserved as an ambulance driver during World War I.

A. he

B. novelists

C. served

D. during