Apparently, advanced tortoises evolved multiple times: the high-domed shells and columnar, elephantine feet of current forms are

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问题 Apparently, advanced tortoises evolved multiple times: the high-domed shells and columnar, elephantine feet of current forms are specializations for terrestrial life that evolved________on each continent.

选项 A、independently
B、interchangeably
C、paradoxically
D、simultaneously
E、symmetrically

答案A

解析 逻辑连接标志为冒号,前后同义对应。前面说advanced tortoises(现代龟)演化了不止一次,因此后面要跟前面同义对应,空格里填入的词要能够体现出现代龟演化了多次,这里的independent可以体现演化了多次,因为如果好几个特征只演化了一次,这些特征之间显然是dependent的,如果几个特征是independently演化的,那就一定是经过多次演化出来的。因此,选A项independently(独立地)。从后面的修饰成分也能判断出选independently,后面说了这些性状是在每一个大陆上进化出来的,既然是在不同大陆上进化的,显然应该是独立进化的,因此选A。
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