Hi all, 我是J2.
2017年3月开始跟以往考试很不一样，每次考试阅读听力部分都是10几题随
机抽，所以就算同一天同一个考场考，A跟B同学碰到的三篇(or四
篇)都会不太一样，听力部分也是如此。
尽管如此，J2发现某些题目会一直不断的重复考，几乎是每个月都会出现一
次了，可以说是托福的“月经文”，例如Earth’s Atmosphere 在
2017.03.11以及2017.03.04出现过两次，Vocalization in Frogs也是很常
出现的文章，底下就来分享一下这篇频考文章前三段重点＋题目，同学也可
以顺便在以下推文作题，
推文范例：推！BCDDA
超过10推公布答案，另外视同学反应分享更多高频文章喔！
对了，SK2近期有两场免费公开课，也欢迎同学报名参加！
10/6 (五) 19:00-21:00口说写作读书会 by Lia
10/12 (四) 15:00-17:00 究极完整托福懒人包 by Lia & J2
报名连结：https://goo.gl/KAzi9Q
Vocalization in Frogs (20170909, 20170506, 20150509)
第一段：先讲一种在中美洲的tungara frog, 叫声（whine）可能单独存
在，但也可能跟着一系列的chucks. 如果在一个池子里只有一只公的，只会
有whine portion of the call, 但如果有其他公的存在，就会包含chucks
的声音。科学家还做了一个实验如果听到事先录好的公青蛙的叫声，其他青
蛙就会发出chucks (That observation suggested that it was the
presence of other calling males that incited frogs to make their
calls more complex.)
1. The word “incited” in the passage is closest in meaning to
A) allowed
B) stimulated
C) forced
D) helped
2. According to paragraph 1, male tungara frogs add chucks to the
whine they produce when
A) other males produce louder whine sounds than they do
B) the frogs are in large pools rather than small ones
C) other males are present in their breeding pool
D) potential mates are unable to hear their whine sounds
第二段：主题句直接问What advantage would a male frog in a chorus
gain from using a whine-chuck call instead of a whine? 可能是可以
吸引到更多异性，两个科学家Ryan and Rand 就做了一个实验来测试。一样
让母的听录音，15只里面有14只会比较倾向往whine-chuck的地方跑过去。
3. What is the relationship of paragraph 2 in the passage to
paragraph 1?
A) Paragraph 2 casts doubt on the accuracy of a scientific
observation discussed in paragraph 1.
B) Paragraph 2 provides a possible explanation for a scientific
observation discussed in paragraph 1.
C) Paragraph 2 identifies some strengths and weaknesses of a
scientific hypothesis discussed in paragraph 1.
D) Paragraph 2 provides additional support for a hypothesis
discussed in paragraph 1.
4. According to paragraph 2, Ryan and Rand conducted an
experiment to find out whether which of the following theories was
true?
A) Male frogs in a chorus use a whine-chuck call in place of a
whine call.
B) Male frogs tend to produce more whine-chuck calls than whine
calls.
C) Female frogs respond differently to live calls from males than
they do to recorded calls.
D) Female frogs prefer a whine-chuck call to a simple whine call.
第三段：主题句直接问下一个问题：If female frogs are attracted to
whine-chuck calls in preference to whine calls, 为何公的青蛙要在别
的公蛙在的时候才发出whine-chuck? 为何不每次发出whine-chuck就好？直
觉想到的第一个理论当然就是因为费力。One possibility is that whine-
chuck calls require more energy than whines, and males save energy
by only using whine-chucks when competition with other males makes
the energy expenditure necessary.但是后来发现公蛙的能量消耗跟
chucks的次数并无关联。另外一个可能性就是发出whine-chuck容易被掠食
者攻击，例如一种蝙蝠会循着青蛙的叫声来找到他们的下落。
5. To be attracted to whine-chuck calls “in preference to”
whine calls means
A) to like whine-chuck calls instead of whine calls
B) to like whine-chuck calls in addition to whine calls
C) to like whine-chuck calls in spite of whine calls
D) to like whine-chuck calls more than whine calls