Câu hỏi: Mark the letter A, B, C, D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
John F. Kennedy's grandfather, John F. Fitzgerald, serves two terms as the mayor of Boston in the beginning of the twentieth century
A. Kennedy's
B. serve
C. mayor
D. in the beginning
John F. Kennedy's grandfather, John F. Fitzgerald, serves two terms as the mayor of Boston in the beginning of the twentieth century
A. Kennedy's
B. serve
C. mayor
D. in the beginning
Động từ serve phải được chia ở thì quá khứ đơn served cho phù hợp với từ chỉ thời gian in the beginning of the twentieth century
Đáp án B.