问题补充:
These natural parks are very important for preserving many animals, which would run the risk of becoming extinct(灭绝的).
A. otherwise
B. other than
C. therefore
D. in another way
答案:
(答案→)A. otherwise
B. other than
C. therefore
D. in another way
解析:考查副词:A. otherwise否则B. other than除了C. therefore因此D. in another way以另外的方式,otherwise“否则,要不然的话”,与虚拟语气连用。