Bats are surprisingly long-lived creatures, some a life span of around 20 years.
A. have
B. had
C. having
D. to have
网友回答
A. have
B. had
(答案→)C. having
D. to have
解析：考察非谓语动词，根据句子结构可知，该处为状语，some指的是some bats，与动词have之间是主动关系，所以选择having作状语
句意为，蝙蝠有出奇的长的寿命，一些蝙蝠有20年的寿命。