The conservation area is very important for preserving many animals and plants, which would run the risk of being extinct.
A. otherwise
B. therefore
C. though
D. instead
网友回答
(答案→)A. otherwise
B. therefore
C. though
D. instead
解析：考查副词：整句意思为“这些国家公园对保护多种动物都非常重要，而这些动物若不保护，将可能濒临灭亡。” ， A. otherwise“否则”，B. therefore“因此”，C. though然而D. instead“代替，反而”，选A。