试着解释一下 The four-million-year-old fossilized skeleton known as Lucy is so small compared with many other skeletons presumed to be of the same species, and so some paleontologists have argued that Lucy represents a different lineage.
so...that结构还是很容易判断的。其次presumed to be分词修饰many other skeletons,用that they have presumed罗索了。
Yellow jackets number among the 900 or so species of the world’s social wasps, wasps living in a highly cooperative and organized society where they consist almost entirely of females—the queen and her sterile female workers. 这道题后半句是一个同位结构,解释wasps的内容。c选项的问题一在which means,不如直接重复同位语部分的名词清楚,二在,almost all,修饰有歧义,可能修饰前面的wasps.
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