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

Câu hỏi :

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

* Đáp án

B

* Hướng dẫn giải

Phương pháp giải:

Copyright © 2021 HOCTAP247