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    Download your digital resources for Cheng & Tsui titles.

    Key Redemption

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    To access purchased content or to download files from the Companion Website, you will need to create an account and register your product.
    Sign in to an existing account or register a new Cheng & Tsui account and enter your product key exactly as it appears.

    (Note: Some products will require you to answer a validation question instead of entering a product key.)

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Do I have to use all three books in each level?

Not necessarily. The three student books in each level are interrelated but independent, meaning they can be used on their own for courses with limited instruction time or combined together to create a richer classroom experience.