Bộ 20 đề thi Tiếng Anh vào 10 có đáp án cực hay (Đề 20)

- “When_ -“In 1928.”A. penicillin was discovered B. penicillin discovered

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- “When_______?”
-“In 1928.”

penicillin was discovered

penicillin discovered

was penicillin discovered

did penicillin discover

Giải thích

Đáp án C