Entering the room,I found Mary____ at the desk and____ a letter.
Sam ________ some knowledge of the computer just by watching others working on it.
I have ________ everything that happened,as I remember it.
We have very strict quality control and anything imperfect is________,so customers feel secure about our products.
A good speaker is supposed to manage to ________ the listeners what he means.
This group of designers ________a plan for the project of the company.