Which word is the right one ?

Click on the link below to listen to Scott

Thornbury from Macmillam Education ELT

giving some information about their right

use,ok ? Are both words acceptable or not ?

https://www.youtube.com/watch?v=JPBPu6Vbjl0

Are you interested in any of these quotes

above ? Make a comment about your favo-

-rite one at the bottom of this post,ok ?

Take care !