THE INVENTION OF PENICILLIN IS VERY USEFUL BECAUSE IT HAS ... LOTS...

4. - File thứ 1: de_thi_anh_8_232201910
File thứ 1: de_thi_anh_8_232201910

4. The invention of penicillin is very useful because it has ... lots of lives.

A. lost

B. brought

C. saved

D. solved