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
SECTION II: LEXICO – GRAMMAR
Part 1: Questions from 16 to 35.
Choose the best answer from A, B, C or D to best complete the following sentences.
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