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TF阅读真题第818篇Easter Island statues

WS 021Set 162 L2

WS 027L1

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TF阅读真题第815篇Archaeopteryx and Bird Evolution

WS 029L2

WS 050L1

The Australlan Megatauna Extinctions Many of the species of large animals(megafauna) such as mammoths, mastodons, ground sloths, and giant deer that roamed the Earth tens of thous...