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题库 / Prep2007E1-CR-46
Archaeologists in Michigan have excavated a Native American camp near Dumaw Creek. Radiocarbon dating of animal bones found at the site indicates that the camp dates from some time between 1605 and 1755. However, the camp probably dates to no later than 1630, since no European trade goods were found at the site, and European traders were active in the region from the 1620's onward.
Which of the following, if true, most strengthens the argument?
Due to trade among Native Americans, some European trade goods would have reached the area before the European traders themselves did.
At all camps in the region that have been reliably dated to the late 1620's, remains of European trade goods have been found.
The first European trade goods to reach the area would have been considered especially valuable and preserved as much as possible from loss or destruction.
The first European traders in the area followed soon after the first European explorers.
The site is that of a temporary camp that would have been used seasonally for a few years and then abandoned.
题目中包含一个假设：如果有trading goods，就一定会被发现。b项刚好强调了这个假设。c项中的the first比较无关，而且as much as possible仍然包含被损坏的可能。
怎么看出来题目包含这样一个假设呢？
因为题干中仅仅说了推测这个营地的时间不晚于1630的原因是这个营地中没有欧洲舶来品，而欧洲商人是在 1620年代才开始贸易的。但单独这个原因也不能说明不晚于1630，因为可能营地存在的时候有贸易，只不过没在营地中留下贸易品而已。而B则正好说明了这一点，故而加强了结论的说服力
感觉你的解释比较说得通，谢谢。
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