Nora is an American girl. She studies in a middle school. She has a little sister. Her name is Kate. Kate is only four. Nora likes Kate very much. 
Today is Sunday. Nora wants her pen. She takes out her pencil box. “ Oh , dear! Where’s my pen?” She can’t find her pen. She goes to ask her sister in her bedroom.
“Kate! I can’t find my pen. Can you see……Oh, what are you doing with (用) my pen?”
“I’m writing to my friend, Betty.” Kate answers. “But how can you? You don’t know what to write.”
“It doesn’t matter (没关系). Betty can’t read.” Kate says.

缩句

①小偷溜进他家偷东西。

②这部珍贵的书稿不明下落。

回答下列有关生物进化和生物多样性的问题。

材料一：某种蛾易被蝙蝠捕食，千百万年之后，此种蛾中的一部分当感受到蝙蝠的超声波时，便会运用复杂的飞行模式，逃脱危险，其身体也发生了一些其他改变。当人工使变化后的蛾与祖先蛾交配后，产出的受精卵不具有生命力。

材料二：蛙是幼体生活于水中，成体可生活于水中或陆地的动物。由于剧烈的地质变化，使某种蛙生活的水体分开，蛙被隔离为两个种群。千百万年之后，这两个种群不能自然交配。

依据以上材料，回答下列问题。