Question 9 is based on the passage you have just heard. 

Passage One

听力原文

       The saying “blind is a bat”, simply isn’t correct. The truth is that all 1,100 bat species can see and often their vision is pretty good, although not as excellent as other night-hunting animals.

       There are two main groups of bats which are believed to have evolved independently of each other, but both from a common ancestor. The first group, known as megabats, are mostly medium-sized or large bats who eat fruits, flowers and sometimes small animals or fish. (9) [These species have distinctive visual centers and big eyes.] They use senses of vision and smell to capture their prey. For example, flying foxes not only see well during daylight, but can also distinguish colors. They actually rely on their daylight vision, and cannot fly during the night with no moonlight. The second group called microbats, are smaller in size and mostly eat insects. (10) [These species use echolocation to find their way and identify food.] Scientists have proven that despite their poorly developed small eyes, these bats still can see during the day. When we consider the nightly lifestyle of these bats, we will see they have to be sensitive to the changing light levels, because this is how they sense when to start hunting. Moreover, vision is used by microbats to travel over long distances, beyond the range of echolocation.

       So, the truth is, there are no bats which are naturally blind. (11) [Some species use their sense of hearing more than their eyes as a matter of adaptation to a particular lifestyle,] but their eyes are still functional.

9. What do we learn about megabats?（关于巨蝙蝠，我们可以知道什么？）

解析：C。录音中提到巨蝙蝠，说这类蝙蝠有独特的视觉中心和大眼睛。C项与此内容相符，big eyes和distinctive visual centers原词复现，因此C项为正确答案。

错项排除：录音中提到巨蝙蝠利用视觉和嗅觉（senses of vision and smell）捕捉猎物，并不是用听觉，故A项排除。录音中提到巨蝙蝠吃水果、花，有时（sometimes）吃小动物或鱼，并不是主要吃小动物和鱼，故B项排除。录音中提到，有两个主要的蝙蝠群体被认为是独立进化的，但都来自同一个祖先（a common ancestor），D项的ancestor is different与此内容相悖，故排除。