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托福阅读句子插入题：Origin of Plants

2015-08-24 16:34:53来源：网络

　　【托福阅读题型：Origin of Plants句子插入题】托福阅读中句子插入题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之句子插入题

　　托福阅读句子插入题：Origin of Plants

　　【Paragraph 3】■The environmental conditions of freshwater habitats, unlike those of ocean habitats, are highly　variable. ■Water temperature can fluctuate seasonally or even daily and changing level of rainfall can lead to fluctuations　in the concentration of chemical in the water or even to period in which the aquatic habitat dries up. ■Ancient fresh water　green algae must have evolved features that enable them to withstand extremes of temperature and periods of dryness.　■These adaptations served their descendant well asthey invaded land.(The Evolutionary Origin of Plants)

　　Look at the four squares [■] that indicate where the following sentence could be added to the passage.

　　Scientists believe that chemical changes and a thicker exterior, among other things, may have helped ancient algae　overcome the conditions in their environment.

　　Where would the sentence best fit? Click on a square to add the sentence to the passage.

　　答案见下一页：

本文关键字: 托福阅读题型 托福阅读训练 句子插入题

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