Trắc nghiệm tổng hợp ôn thi tốt nghiệp THPT môn Tiếng Anh Chuyên đề III. Đọc điền thông tin, thông báo, quảng cáo có đáp án
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The new curriculum _______ two years ago to better align with educational standards. A. were introduced B. had been introduced C. was introduced D. had introduced

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The new curriculum _______ two years ago to better align with educational standards. 

were introduced

had been introduced

was introduced

had introduced

Giải thích

Chọn đáp án C