出国留学网专题频道张掖托福考试栏目，提供与张掖托福考试相关的所有资讯，希望我们所做的能让您感到满意！
下面是出国留学网托福频道整理的张掖托福作文题目库，欢迎参考。
Some people think that parents should plan their children's leisure time carefully Other people believe? that children should decide for themselves how to spend their free time, Which idea do you agree with?
Travelling is more important than reading books in order to understand the people and the world Do you? agree or disagree with the statement Use specific reasons to support your answer
Some people like different friends Others like similar friends Compare the advantages of these two? kinds of friends Which kind of friend do you prefer Explain why?
After they complete their university studies, some students live in their hometowns, others live in? different towns or cities Which do you think is better living in your hometown or living in different towns or cities Give specific reasons for your answer
Some people believe that newspaper are the best source of news Others think that the news is presented? better on radio or television Which of these sources of news do you prefer? Use specific examples to? support your choice
Some people learn best when a classroom lesson is presented in an entertaining , enjoyable way Other? people learn best when a lesson is presented in a serious, formal way Which of these two ways of? learning do you prefer? Give reasons to support your answer
Some people believe that growing up in a large family, with several sisters and brothers, offers? more ...
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下面出国留学网要给大家分享的是2015年11月21日张掖托福考试听力预测，听力水平无疑是新托福成功与否的关键，除阅读外，无论哪一部分都离不开“听”。对于中国考生来说，听力却正是薄弱环节。托福听力复习期间，记笔记是很重要的一步，托福听力不是说只要复习了就一定能提高，还需要有方案的进行托福听力备考。如果我们的词汇量较少，加上托福听力的场景不熟悉，我们很容易在托福考试中直接出局。所以从现在开始把握2015年11月21日托福听力机经，这样才能最有效的单科提分。
2015年11月21日张掖托福听力真题预测：
L1：关于benificial bacteria的，bacteria有好有坏，主题是讲好的bacteria对人类的益处。例如帮助消化，同坏的bacteria争夺食物等。Bacteria到处都有，研究称人身体里的bacteria占cell的90%之多。说完之后教授评论了两句，(有题)。杀菌剂，尤其是广谱杀菌剂可以在杀死坏bacteria的同时杀死好的。例如当用了soap，会杀死坏的，同时一大部分好的也会被杀死，提升感染的风险(有题问用了soap会如何)。还有说yogurt里边好多live bacteria，生病时医生推荐喝。后边又说了一个理论，现在还处于试验阶段，但是已经有evidence可以证明了。
L2：天文学，讲了3种星云emission, reflection和dark nebulae。 Emission nebulae是由于内部不断有新的star产生所以保持高温，或者是由于天体爆炸所产生巨大的热量，因而是红色的，教授分别给了一个例子。 Reflection nebulae是反射周围其他天体的热量，内部并不产生热量，所以是蓝色的。 Dark nebulae就是那些星云太厚阻碍了光线传播的星云，你能看到在一堆星星中一些亮光中有黑色的洞，那可能就是暗状星云造成的，举例在赤道附近能看到一些暗状星云。
L3：science 讲我们设计的飞机绝大多数都是根据bird的原理设计的，其实bat的飞行有很多优点，接着分别讲两者的优点，因为翅膀结构不一样所以引起的air current不一样，bat飞行更有flexible。以后的飞机设计可以借鉴bat的优点。(有题，考老师对此的态度)(有一题提到boat是为了说明什么，不知选什么。)
L4：好像是species exclusion hypothesis
说一个人提出来如果一个habitat 有两种食物居住地基本都一样的什么的话，其中一种生物会占据优势，然后导致另一个生物灭绝(有题，问这个人认为一下哪些是对的)
但是后来人们觉得他这个理论不太合理。首先实验室条件太理想化。而是物种太少，只有两种。自然界远比这种复杂。人们从自然街能找出很多反证...
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