All worksheet files are in PDF format. In order to view these files, you need a PDF viewer.
You can download Foxit reader (a Free PDF viewer) from here. (Make sure to select the free reader).
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Once you have opened the file, you can print it by clicking on File, and then choosing Print.
If you need further help, please send an email by clicking on the email link on the contact page.
The audio files are in mp3 format. When clicking on an audio file, it may download or it may buffer and start playing, depending on the settings on your browser.