What idea can a man who is blind from birth have ____ color?
---Did you notice Tom was busy all day in his office?---Oh, yes, he has just finished his business tour of Chicago. He has a lot of work to ___.
I was not bothered by his poor English ___ by his lack of manners.
You should try to get a good night sleep____ much work you have to do.
It is well known ___ a person eats causes changes in the body.
The unemployment figures this year are close to ___ of the year before last.