Master the CH sound. It stops air flow, then releases it in a blast of air.
OPEN lesson document by clicking the link on the left. CLICK the Download button to download a copy of the document. CLICK the three-dots menu at the right end of the audio player to download the audio file.
To listen to audio while reading the document, OPEN the document in a new tab (right-click > Open Link in New Tab), then START audio here and SWITCH to the other tab to view the document as the audio plays.