第21题:[单选题]This kind of animals are on the verge of extinction on,because so many are being killed for their fur. A.drying up B.dying out C.being exported D.being transplanted 参考答案:B 句意:这种动物濒临灭绝,是因为人们为获取它们的毛皮把它们中的多数都给杀死了。extinction意为“灭绝,消灭”,与die out(绝种)意思相近。dry up意为“擦干”;export意为“出口”; transplant意为“移植”。