2. 外语
  3. The method for making beer has changed over time. Hops (啤酒花) , for example, which give many a modem beer its bitter flavor, are

The method for making beer has changed over time. Hops (啤酒花) , for example, which give many a modem beer its bitter flavor, are

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问题     The method for making beer has changed over time. Hops (啤酒花) , for example, which give many a modem beer its bitter flavor, are a【C1】______ recent addition to the beverage. This was first mentioned in reference to brewing in the ninth century. Now, researchers have found a【C2】______ ingredient in residue (残留物) from 5000-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【C3】______ they were used to brew, filter, and store beer. They may be ancient "beer-making tools", and the earliest【C4】______ evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences. To【C5】______ that theory, the team examined the yellowish, dried【C6】______ 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,【C7】______ 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【C8】______ food in central China until about 2,000 years ago, according to the researchers. Based on that timing, they indicate barley may have【C9】______ in the region not as food, but as【C10】______ material for beer brewing.
A) arrived I) relatively
B) consuming J) remains
C) direct K) resources
D) exclusively L) staple
E) including M) suggest
F) inform N) surprising
G) raw O) test H) reached
【C8】
选项
答案L
解析 空格前为不定冠词a，空格后为名词food，故本空需要填入一个形容词。结合句意可知，这种作物直到大约2000年前才成为中国中部地区主要的食物。备选项中只有staple(主要的，基本的)符合句意，故答案为L。
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