The islands developed on their own for 80 million years and have many rareanimals found n

问题补充：

The islands developed on their own for 80 million years and have many rare

animals found nowhere else.

A. soon

B. so

C. early

D. yet

答案：

A. soon

(答案→)B. so

C. early

D. yet

解析：词义辨析。A.不久 B. 因此C. 提早D. 仍旧。句意：这个小岛独自发展了80万年，因此能找到其他地方没有的稀有动物。故选B。