1928, Alexander Fleming, English scientist, discovered a mold called ____ that killed germs. Penicillium paved the way for the development of a new type of drug, ____, which attacked and weakened bacteria. In the late 1800s, ____ became legal in many countries of Europe and pushed for better working conditions and higher wages. Urban conditions were improving in the late 1800 and early 1900s, as architects began using ____ to construct stronger, taller buildings. Underground ____, introduced in London & Paris, made cities healthier places to live.

Science & Technology Refresher Cloze, Pt. II

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