3. What is meant by "concert songs" in the seventh paragraph?

　　A)Songs sung by zebra finches at a concert.

　　B)Songs sung by male finches for female finches.

　　C)Songs sung by female fmches for male finches.

　　D)Songs sung by male fmches to many female finches.

　　4. What is NOT true of directed communication?

　　A)The sender of a message has a specific audience.

　　B)Male zebra finches sing to female finches.

　　C)Mothers talk to their babies，

　　D)Male zebra finches sing to themselves.

　　5. Which of the following can best reflect the theme of the passage?.

　　A)Chirping away.

　　B)Birdsongs as communication.

　　C)Zebra finches and their life.

　　D)Enjoying birdsongs.

　　答案與題解：

　　1. C 文章第一段的第二句告訴我們，雄性斑胸草雀只要注意到有雌性斑胸草雀聽他唱歌便會改變聲調。其他選項均不是該段所表達的意思。

　　2. A 選項B、C、D 都不是答案，因為文章的第五段說，有配偶的雌性胸草雀更喜歡她們配偶的歌聲，而沒有配偶的喜歡的聽雄性斑胸草雀為雌性斑胸草雀的歌。

　　3. B 第四段提到…a male performing for a female audience， as if he was giving a concert. 所以，第七段中的concert songs 即指雄性斑胸草雀為雌性斑胸草雀的歌。

　　4. D 文章的最后一段解釋了什么是directed communication，即，when the communicator， or sender， focuses the message for a specific audience. 該段又舉了母親對嬰兒說話的例子，說明這與雄性斑胸草雀為雌性斑胸草雀的歌同屬directed communication.

　　5. B 文章所涉及的研究旨在發(fā)現(xiàn)雄性斑胸草雀歌聲是否會在不同的情況下發(fā)生變化，其結果是，它們在為雌性斑胸草雀唱歌時，會改變聲調和速度。這就是說，它們的歌聲實際上是一種交流方式。所以應選擇B.