单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】

单选题 The method for making beer has changed over time. Hops (啤酒花), for example, which give many a modern beer its bitter flavor, are a ______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a ______ ingredient in residue (残留物) from 5,000-year-old beer brewing equipment. While digging two pits at a site in the central plains of China, scientists discovered fragments from pots and vessels. The different shapes of the containers ______ they were used to brew, filter, and store beer. They may be ancient “beer-making tools,” and the earliest ______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To ______ that theory, the team examined the yellowish, dried ______ inside the vessels. The majority of the grains, about 80%, were from cereal crops like barley (大麦), and about 10% were bits of roots, ______ lily, which would have made the beer sweeter, the scientists say. Barley was an unexpected find; the crop was domesticated in Western Eurasia and didn’t become a ______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have ______ in the region not as food, but as ______ material for beer brewing.【仅支持A-H选项，选项超出支持范围】