evidence - facts that help to prove something, preliminary - coming before the main or most important part of something, click on - to make a computer do something by pressing a button on the mouse, pyramid - a large stone structure with a square base , source  - something that provides what you need or want, link - a connection between one file or section and another, mysterious - not explained or understood or unknown, crystal  - a clear rock that looks like glass, especially quartz,

Gateway A2 Unit 10

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