三、克漏字測驗【請依照段落上下文意，選出最適當的答案】
 第一篇：
       For decades, habitat loss and hunting__ 31__ a huge threat to the whooping cranes of North America. Whenthe bird was listed as __32__ in 1967, there were just 48 of them left in the wild. In 1978, a couple of whoppingcrane habitats were established in the U. S. and its northern neighbor, and the birds get to live and grow safely inWisconsin, Florida, and at Wood Buffalo National Park in Canada. Due to this establishment of their __33__ ,along with other measures including effective breeding and reproduction programs, and __34__ , the currentpopulation of this North America’s tallest bird is now at about 600. Though the crane’s future remains uncertain,it is one of conservation’s __35__ stories.
【題組】31.
(A) will pose
(B) had posed
(C) are posing
(D) were posed