求教OG163

gator21

我选的是C,不知道为什么答案选D ，请大侠指教，谢谢！！

steveyangxt

以下是引用gator21在2005-9-11 1:00:00的发言：
我真粗心，没有发现应该是单数，因为有its。 但是，为什么OG说use their...limbs to hand..., sleep..., and move...是不对的呢？

因为hand..., sleep..., and move这一系列的动作都是用他们的limbs的目的。显然不对。

gator21

原题：

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 od algae grow on its coat and between its toes.

a) sloths hang from trees by long rubbery limbs and sleep fifteen hours a day, moving infrequently enough

C) sloths use their long rubbery limbs to hang from trees, sleep fifteen hours a day, and move so infrequently

D)The sloth hangs from trees by its long rubbery limbs, sleeping fifteen hours a day and moving so infrequently

beifeng

原题呢？

gator21

我真粗心，没有发现应该是单数，因为有its。 但是，为什么OG说use their...limbs to hand..., sleep..., and move...是不对的呢？