Question 1 Text: The discovery of penicillin in 1928 was a major milestone in medicine. Before this (1) _____ , many bacterial infections were often fatal, but the introduction of this antibiotic (2) _____ the treatment of such diseases and (3) _____ the door to modern antibiotics. Options: [opened, changed, however, previously, revolutionised, consequently] Answers: 1 → previously 2 → changed 3 → opened Explanation: “previously” fits blank (1) because it refers to a time before penicillin. “changed” fits blank (2) because the antibiotic altered treatment. “opened” fits blank (3) as it metaphorically opens a door (to modern antibiotics). Question 2 Text: Environmental scientists warn that rising sea-levels may eventually (1) _____ coastal cities, forcing mass evacuations and significant economic impacts. If no action is taken, the cost could (2) _____ billions of dollars by mid-century. Options: [threaten, amount to, affect, exceed, however, including] Answ...