163. Found throughout Central and South America, sloths hang from trees by long rubbery limbs and sleep fifteen hours a day, moving infrequently enough that two species of algae grow on its coat and between its toes.
D, the best choice, correctly subordinates sleeping and moving to hangs while using the idiomatically correct phrasing so (infrequently) that.... The pronoun its shows clearly that the limbs belong to the sloth, not the trees. Choice A illogically coordinates hang and sleep and, like E, uses the unidiomatic expression infrequently enough that. B creates an awkward and nonparallel series: sloths hang ..., they sleep ..., and with.... C creates a confusing and absurd image with use their... limbs to hang ..., sleep ..., and move .... A, B, and C all mistakenly use the plural sloths, which does not agree , with its coat and... its toes. E wrongly coordinates hangs and sleeps and violates parallelism by inserting it before moves to create a new independent clause.
如果按照标准答案的理解选D当然是没有问题的the sloth hangs from trees by its long rubbery limbs, sleeping fifteen hours a day and moving so infrequently
但是我不能理解，如果用并列结构来考虑的话就应该是：the sloth hangs from trees by its long rubbery limbs, sleeps fifteen hours a day and moves so infrequently这样的有错吗？我一开始拿到题目，第一感觉就是这么想的，跟og的想法不一样。不知道为什么这样错了？
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