EXERCISE 7. CHOOSE THE BEST OPTION TO COMPLETE THESE FOLLOWING SENTENC...
6. Someone discovered penicillin in 1928, _________?
A. hadn't he/she
B. didn't he/she
C. didn't someone
D. wasn't he/she
6. Someone discovered penicillin in 1928, _________?
A. hadn't he/she
B. didn't he/she
C. didn't someone
D. wasn't he/she