标题: prep2-110 [打印本页] 作者: cyang16 时间: 2009-11-24 23:50 标题: prep2-110 The ivory-billed woodpecker, once the largest woodpecker in North America at a striking 20 inches tall, has moved in and out of the extinct category, with scientists consistently unable to find solid proof for the bird to still exist.
(A) for the bird to still exist (B) for the bird as still existing (C) for the bird's continued existence (D) that the bird still exists (E) of the bird and its continued existence