Compléter AUTONOMOUS WORK 1 - CONNECTORS - Exercise AVersion en ligne Complete the text with the following connectors: however, as, therefore. par Ana Carrizo 1 When Adams was conducting tests of various formulas , he discovered that the desiccated resin was insoluble in water and extremely plastic . 1 , in an attempt to salvage his investment , he began selling small portions of flavourless chicle to drugstores . Adams ? formula was not the first chewing gum patented in the United States ; 2 , it became the most popular 3 Adams added various flavours to his product . Adams ? discovery was patented in 1871 . Natural chicle is made from the coagulated milky latex of the sapodilla tree , a tropical fruit tree of Central America ; 4 , after World War II , chicle was virtually replaced by various waxes , plastics , and synthetic rubber in chewing gum manufacture . Artificially sweetened chewing gum found a wide market in the United States beginning in the late 20th century with a wide variety of flavours ; 5 , mint remained the favourite one .
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