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  3. The first man who cooked his food, instead of eating it raw, lived so long ago that we have no idea who he was or where he lived

The first man who cooked his food, instead of eating it raw, lived so long ago that we have no idea who he was or where he lived

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问题     The first man who cooked his food, instead of eating it raw, lived so long ago that we have no idea who he was or where he lived. We do know, 【C1】______ , that for thousands of years food was always eaten cold and 【C2】______ . Perhaps the cooked food was heated accidentally by a 【C3】______ fire or by the molten lava(熔岩) from an erupting(喷发的) 【C4】______ . When people first tasted food that had been cooked, they found it tasted better. However, 【C5】______ after this discovery, cooked food must have remained a rarity 【C6】______ man learned how to make and 【C7】______ fire.
    Primitive men who lived in hot 【C8】______ could depend on the heat of the sun to cook their food. For example, in the desert areas of the southwestern United States, the Indians cooked their food by placing it on a flat 【C9】______ in the hot sun. They cooked pieces of meat and thin cakes of corn meal in this 【C10】______ We guess that the earliest kitchen 【C11】______ was a stick 【C12】______ which a piece of meat could be attached and held over a fire. Later this stick was 【C13】______ by an iron rod which could be turned frequently to cook the meat 【C14】______ all sides.
    Cooking food in water was 【C15】______ before man learned to make water containers that could not be 【C16】______ by fire. The 【C17】______ cooking pots were reed or grass baskets in which soups and stews could be cooked. 【C18】______ 166 B. C. the Egyptians had learned to make mere 【C19】______ cooking pots out of sandstone. Many years later, the Eskimos learned to make 【C20】______ pans.
【C6】
选项 A、when
B、which
C、until
D、as
答案C
解析
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