Question

[Lê Quỳnh Anh]

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Not until the end of the 19th century ______ become a scientific discipline. 

A. plant breeding has 

B. did plant breeding 

C. plant breeding had 

D. has plant breeding 

Answer 1

[Dương Hoàn Anh]

Đáp án là B.

Sử dụng cấu trúc : Not until + time + did + S +V = It was not until + time that S + Ved: Tận cho đến khi…