Why Do Bridges Arch? Level 3
A series of twenty non-fiction science readers which engages children in the world around them.
What holds up skyscrapers?
Why are sports domes curved?
Why are triangles used in many bridges?
You can find the answers to these and other questions about structures in Why Do Bridges Arch?
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Guess What! American English Level 3
Workbook with Online Resources
Engaging facts, amazing photography and captivating real-life video take young learners on a journey to explore the world as they learn English.Author: Lynne Marie RobertsonEnglish Type: American EnglishCEF Level: A1Publication date: August 2015
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