阅读下面短文,从所给选项中选出能填入空白处的最佳选项,使短文通顺,结构完整,其中有一项是多余选项。
You are what you eat, as a saying goes. This is really true for the giant panda. What pandas eat has a big influence on many different parts of their lives.
(1) This is because pandas mostly eat bamboo, which is very poor in nutrition(营养) and difficult to take in. Since 99% of a panda’s food is bamboo, pandas have really small babies. Baby pandas are born helpless and tiny. (2) No other mammal’s babies are born so much smaller than their mother. But baby pandas grow quickly. (3)
The black and white fur of pandas may help them to hide. Once again, we can look at a panda’s food to help understand the reason. In winter, they can’t change their fur quickly enough to match their background like other animals can. (4) In the past, pandas lived in and travelled across large places and faced lots of predators(捕食者). So, their black and white fur was very important for them to keep safe.
(5) The main danger to pandas is not from predators, but rather from less bamboo, more human activities and climate change. The good news is that pandas are no longer known as endangered.
A. However, things are a little different today.
B. One-year-old pandas can be about 45 kg heavy.
C. They are just 140 g, about $\frac{1}{1000}$ the size of their mother.
D. For one, pandas have to spend more than half a day eating.
E. The baby pandas can’t see clearly at birth and sleep all day.
F. So being black and white helps them hide in both snow and the dark.

1. D 2. C 3. B 4. F 5. A

我们逐空结合上下文逻辑分析：
1. 空后内容解释熊猫主食的竹子营养匮乏、难以吸收，对应引出饮食对熊猫生活的第一个影响，D选项“首先，熊猫不得不花费半天以上的时间进食”符合此处因果逻辑。
2. 空前说明熊猫幼崽出生时无助且体型极小，空后提到没有其他哺乳动物的幼崽出生时比母体小这么多，C选项“它们只有140克，体型约为母体的千分之一”具体说明幼崽极小的特征，衔接上下文。
3. 空前提到熊猫幼崽生长速度很快，B选项“一岁的熊猫体重可以达到约45千克”是对幼崽生长速度快的具体例证，逻辑通顺。
4. 空前说明熊猫没法像其他动物一样快速换毛匹配周边环境，F选项“所以黑白的毛色能帮助它们在雪地和黑暗环境中都藏好”解释了熊猫黑白皮毛的隐藏作用，衔接前文内容。
5. 前文介绍过去熊猫要面对很多捕食者，黑白皮毛帮助它们保证安全，空后说明现在熊猫的主要威胁不再来自捕食者，A选项“然而如今情况有些不同了”构成过去和现在的转折，衔接自然。
多余选项为E。