囧哥做语法3

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According to two teams of paleontologists, recent fossil discoveries in Pakistan show that whales, porpoises, and dolphins are more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today includes cows, camels, pigs, and hippos--than to any other mammals.
A. that whales, porpoises, and dolphins are more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today includes cows, camels, pigs, and hippos—than
B. that whales, porpoises, and dolphins are more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today include cows, camels, pigs, and hippos—as
C. whales, porpoises, and dolphins to be more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today include cows, camels, pigs, and hippos—than they are
D. whales, porpoises, and dolphins as being more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today includes cows, camels, pigs, and hippos—as they are
E. whales, porpoises, and dolphins as more closely related to some of the oldest known even-toed ungulates--a group of hoofed mammals that today include cows, camels, pigs, and hippos—than

考察句子结构和主谓一致
首先：宾语从句后的that不能省略，所以这里的宾语从句show…后面的that是不能省略的。所以CDE不对
其次考察主谓一致中的核心词原则，A of B that,所以这里的that修饰 a group所以是单数includes而不是include.
同时，表示比较的时候用than（more closely related…than…）而不用as，所以选择A