After the war he continued his research. For years he toiled on; then in September 1928 he made one of the greatest discoveries of all time. He had been growing colonies of bacteria in flat, open dishes. A few days later he saw that mould had settled in one of the dishes. However, he did not throw away the dish; instead he examined it and saw that no bacteria grew near the mould. “Had the mould killed the bacteria?” he asked himself.

　　A chemical from the mould had done just that. Fleming later named this chemical penicillin. Thus one of the greatest achievements of man had taken place.

　　But penicillin was not immediately used—years were to pass before that happened. More knowledge about the drug was gained and in 1941 many people were successfully treated. Before long penicillin was produced on a large scale, and during the Second World War it helped save thousands of wounded soldiers.

　　1. When Fleming was around twenty years of age, he

　　.

　　A. worked in a shipping company

　　B. received some money from his uncle who had died

　　C. joined Wright’s laboratory staff

　　D. served in the Royal Army Medical Corps

　　2. During the First World War, Fleming was horrified by

　　.

　　A. the lack of proper useful things in hospitals

　　B. the lack of antiseptics available for deep wounds

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