DISCOVERING (A) A THERAPY (B) FOR CANCER IS (C) ONE OF (D) BIGGEST CHALLENGES FACING MEDICALRESEARCHERS

2/ - SACH BT ANH 10 CO DAP AN
SACH BT ANH 10 CO DAP AN

2/ Discovering (A) a therapy (B) for cancer is (C) one of (D) biggest challenges facing medical

researchers.