Many kinds of animals are believed to have _________ from the earth.
A、withdrawn
B、vanished
C、found
D、hung
【正确答案】：B
【题目解析】：withdraw（使）撤离；撤销；取款；收回（前言）；退出；vanish消失；突然不见；成为零；found找到（find的过去分词）vt. 创立，建立；创办；hung悬挂；垂落；（使）低垂，下垂；绞死，施以绞刑；（使）挂在墙上；装（门）（hang 的过去式和过去分词）句意：许多种动物被认为已经从地球上消失了。
