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题库 / Prep2007E1-SC-104
In Britain, "pig" refers to any member of the class of domestic swine, but the United States uses the term when referring only to younger swine not yet ready for market and weighing less than 82 kilograms (180 pounds).
the United States uses the term when referring
the United States term refers
in the United States the term refers
in the United States they use the term as it refers
it is used in the United States when referring
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the United States term，结构是合成词，第一个名词形容词化，但因为美国有专门的形容词American，故不将USA形容词化使用，如The American flag美国国旗，First lady of the United States美国第一夫人
use sth when……将use这个动作发生的时间现在在when里，如use umbrella when it's raining，这里不是要说人们当且仅当形容小猪猪时使用pig，而是说人们用pig来形容小猪猪，所以when的使用是错误的
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