It was not until the end of the nineteenth century . A. did plant breeding become a scientific discipline B. that plant breeding became a scientific discipline C. that a scientific

9/50

It was not until the end of the nineteenth century .

did plant breeding become a scientific discipline

that plant breeding became a scientific discipline

that a scientific discipline was plant breeding

did a scientific discipline become plant breeding

Giải thích

Đáp án đúng là: B

Giải thích: It is/ was not until + mốc thời gian + that + S + V: Mãi đến….thì….

Dịch: Mãi đến cuối thế kỷ 19 thì nhân giống cây trồng mới trở thành môn khoa học.