2000 câu trắc nghiệm tổng hợp Tiếng Anh 2025 có đáp án (Phần 25)

However, because of the population boom and the urgent demand for upgrading the more modern road system, the rail tracks were (25)_______ removed and completely disappeared in 1990.

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However, because of the population boom and the urgent demand for upgrading the more modern road system, the rail tracks were (25)_______ removed and completely disappeared in 1990.

occasionally

gradually

regularly

eventually

Giải thích

B. gradually

Giải thích:

gradually: dần dần