阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

　　Mandara seemed to know something big was about to happen．So she let out a yell, caught hold of her 2­year­old daughter Kibibi and climbed up into a tree．She lives at the National Zoo in Washington, D．C．

　　And on Tuesday, August 23rd, witnesses say she seemed to sense the big earthquake that shook much of the East Coast before any humans knew what was going on．And she's not the only one．In the moments before the quake, an orangutan(猩猩) let out a loud call and then climbed to the top of her shelter.

　　"It's vey different from their normal call，" said Brandie Smith, the zookeeper．"The lemurs (monkeylike animals of Madagascar) will sound an alarm call if they see or hear something highly unusual."

　　But you can't see or hear an earthquake 15 minutes before it happens, can you? Maybe you can-if you're an animal．"Animals can hear above and below our range of hearing，" said Brandie Smith．"That's part of their special abilities．They're more sensitive to the environment, which is how they survive."

　　Primates weren't the only animals that seemed to sense the quake before it happened．One of the elephants made a warning sound．And a huge lizard(晰蜴) ran quickly for cover．The flamingoes (a kind of bird) gathered before the quake and stayed together until the shaking stopped.

　　Not all the animals behaved unusually before the quake．For example, Smith says the zoo's giant pandas didn't jump up until the shaking actually began．But many of the other animals seemed to know something was coming before it happened．"I'm not surprised at all，" Smith said.

　　文章大意：这篇文章主要讲了在地震前动物们的表现，有些动物对地震敏感，而有些动物对地震没有察觉。

　　1．Why did Mandara act strangely one day？ __A__

　　A．Because it sensed something unusual would happen.

　　B．Because its daughter Kibibi was injured.

　　C．Because it heard an orangutan let out a loud call.

　　D．Because an earthquake had happened.

　　解析：细节理解题。根据第一段Mandara seemed to know something big was about to happen.可知选A。

　　2．According to Brandie Smith, __A__ .

　　A．many animals' hearing is sharp

　　B．earthquakes produce two types of waves

C．primates usually gather together before a quake