25 chuyên đề ngữ pháp tiếng Anh: CD21: Bài tập Đảo ngữ Tâm Trần - March 2, 2023 0 Chọn đáp án đúng Not until the end of the 19th century _____ became a scientific discipline. has plant breeding did plant breeding plant breeding had plant breeding has None 2. No longer _____ to do all her housework with her husband because our family now owns some new labor-saving devices. my mother has has my mother does my mother does my mother have None 3. At no time ______ know the result of the recognition. the public will will the public the public does the public None 4. No sooner had he sat down to lunch ____ there was a knock at the door. than that as when None 5. Never before ____ such a beautiful girl. have I met have I meet I have met did I met None Time's up