But before refrigeration, it was 25 (considered, thought, judged, believed) a luxury. For many years, people 26 (produced, did, made, created) ice cream only by hand. The key ingredients – milk and sugar, cream and eggs – were 27 (filed, located, laid, placed) in a bowl that was then put in a larger container with salt and ice. Then the ingredients had to 28 (remain, stay, have, be) churned (or stirred). Before refrigeration, ice had to be cut from lakes and ponds and 29 (stored, saved, collected, gathered) in the ground. Ice harvesting was a very profitable business in areas that had a lot of ice. Merchants shipped ice all around the world. In 1926, the modern freezer was 30 , and the mass production of ice cream became possible.

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