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.

Grover Cleveland was the only American president served two nonconsecutive terms.

Lời giải:

Đáp án: C

Giải thích: Rút gọn mệnh đề quan hệ có chứa “the only/ first/ second/ so sánh nhất” dùng to V