1、The United States national debt was relatively small until the Second World War, during when it grew from $43 billion to $259 billion in just five years. 答案为C 问：请问如何修改？另外此题中during是介词，后边怎么能跟句子？
2. By 1920 the area of the United States under cultivation had more than doubled in just 50 years, and the national population that surpassed 100 million. 答案为A 问：under cultivation是句子中地什么成分？另外什么时候用by，什么时候用in？
3。 Some areas of the deep sea are vulnerable frequent natural disturbances taking the form of intense currents, mud slumps, low oxygen, and upwellings. 答案为A 问：如何修改？
4。The layers of an elephant's tusk are deposited from the pulp, yet that the innermost layer is the newest. 问，yet错误，如何修改。
1、The United States national debt was relatively small until the Second World War, during when it grew from $43 billion to $259 billion in just five years. 答案为C 问：请问如何修改？另外此题中during是介词，后边怎么能跟句子？ ----------------------------------------------------------------------------------------------------- when-----which. 这是一个定语从句,先行词是the Second World War, during 是一个prep,所以后面用which, 这里其实during which= when.
2. By 1920 the area of the United States under cultivation had more than doubled in just 50 years, and the national population that surpassed 100 million. 答案为A 问：under cultivation是句子中地什么成分？另外什么时候用by，什么时候用in？ -------------------------------------------------------------------------------------------------------------------- under cultivation在这里是prep 短语作后置定语修饰the area. 主句用的是过去完成时,所以这里要用by,表示"在...之前" ; in 表示一个时间点,一般用过去时.
3。 Some areas of the deep sea are vulnerable frequent natural disturbances taking the form of intense currents, mud slumps, low oxygen, and upwellings. 答案为A 问：如何修改？ ---------------------------------------------------------------------------------------------------- 这里vulnerable frequent 位置倒了吧?应该是 frequent vulnerable
4。The layers of an elephant's tusk are deposited from the pulp, yet that the innermost layer is the newest. 问，yet错误，如何修改。
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发表于 2003-10-21 10:01:00
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