Many people like pandas very much. They are very 1   . Most of them live in Sichuan,    2  .  They    3 white hair,  but their shoulders,  legs,  ears and eyes are    4  . Pandas are usually heavy,  but they can climb trees like  5   animals.
   Pandas’ favorite food is bamboo    6  . But long long ago(很久很久以前),  pandas liked to eat meat. It takes pandas a lot of time to have food every day. When pandas are full(吃饱的),  they like    7 . They relax many hours every day.
   However, there are   8   pandas in the world today.    9   some people cut down (砍伐) too many bamboo trees and pandas can not find enough(足够的) food.
   I think we must    10   them

现存的某些生物与它们百万年前的生存形式仍几乎相同，对这一现象解释最恰当的是（  ）

“探险队员”——硫酸，不小心走进了有许多“吃人的野兽”（即能与硫酸发生化学反应的物质）的小山，逃生线路有多种，但有一条线路是完全行不通，即为入口→③→⑤→⑦→⑨→出口，则该线路涉及的物质为（   ）。

用所给单词或短语翻译句子