Robert Frost was not well known as a poet until he reached the forties.
A. as
B. poet
C. reached
D. the
Trước số tuổi không dùng mạo từ “the”
The => His forties (Trong những năm 40-49 tuổi)
=> Robert Frost was not well known as a poet until he reached his forties.
Tạm dịch: Robert Frost không nổi tiếng là một nhà thơ cho đến khi ông bốn mươi tuổi.
Đáp án: D
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