A　Male zebra finches like to sing to female zebra finches.

　　C　Male zebra finches change their songs in female zebra finches presence.

　　32　What did the researchers find in their study of female zebra finches? _________

　　B　Female finches only liked songs male finches sang for their mates.

　　D　Female finches chose the best male singers as their mates.

　　A　Songs sung by zebra finches at a concert.

　　C　Songs sung by female finches for male finches.

　　34　What is NOT tree of directed communication? __________

　　B　Male zebra finches sing to female finches.

　　D　Male zebra finches sing to themselves.

　　A　Chirping away.

　　C　Zebra finches and their life.

　　参考答案：

　　32　A选项B、C、D都不是答案，因为文章的第五段说，有配偶的雌性斑胸草雀更喜欢听她配偶的歌声，而没有配偶的喜欢听雄性斑胸草雀为雌性斑胸草雀唱的歌。

　　34　D文章的最后一段解释了什么是directed communication，即，when the communicator， or sender，focuses the message for a specific audience.该段又举了母亲对婴儿说话的例子，说明这与雄性斑胸草雀唱歌同属directed communication。

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