Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questionsThe last of these reasons is_____________the most important.

Đáp án D

- by far + so sánh nhất: dùng để nhấn mạnh

E.g: He is by far the most intelligent in his class.

- much/far + so sánh hơn (dùng để nhấn mạnh)

E.g: He is much/far taller than his father.

"Trong những lý do này thì lý do cuối là quan trọng nhất."