The exam to (A) become a lawyer is (B) on far the (C) most difficult

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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.

The exam to (A) become a lawyer is (B) on far the (C) most difficult he (D) has taken

become

most

has

Giải thích

Đáp án B

By far: rất nhiều, vượt trội hơn nhiều, bỏ xa (dùng trong so sánh hơn nhất để nhấn mạnh)

E.g: She is by far the most intelligent student in the class. (Cô ấy là học sinh thông minh vượt trội hơn nhiều so với những học sinh khác trong lớp.)

Đáp án B (on => by)