ALEXANDER FLEMING WAS FAMOUS … PENICILLIN

12. - BAI TAP TIENG ANH LOP 7 TRAC NGHIEM TU BAI 1 16
Lớp 7 BAI TAP TIENG ANH LOP 7 TRAC NGHIEM TU BAI 1 16

12. Alexander Fleming was famous … penicillin.

a. of discover b. of discovering c. for discovering.