” - IN 1928A. PENICILLIN WAS DISCOVERED B. WAS PENICILLIN DISCOVEREDB....

BAI LUYEN THI KI 2 LOP 9 SO 5

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Đáp án tham khảo

8.“When...?” - In 1928

a. penicillin was discovered b. was penicillin discovered

b. did penicillin discovered d. did penicillin discover