问题
选择题
Many of the earth’s plants and animals have already ______ and several other species are endangered．
A．died away
B．died out
C．died down
D．died of
答案
答案：B
短语辨析。 A．消失 B．灭绝 C．逐渐消失D．死于。句意：地球上的许多动物和指物已经灭绝，一些其它物种濒临灭绝。故选B。