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Here
are some files with exercises on telephoning

This is a crossword I've designed so that you go over some expressions to describe ups and downs.
What about your company's sales? You can post a comment here explaining its ups and down, including as many words from the crossword as you can 
These are some glossaries with useful expressions when giving presentations.


You can also practice on line:
www.englishclub.com/business-english/presentations.htm
www.effective-public-speaking.com/
I promise they are fun! 