【2015·陕西】You _____feel all the training a waste of time, but I’m a hundred percent sure later you’ll be grateful you did it.
No matter how much you’ve learned and how high a standard of education you have had, you must _______ the people heart and soul.
. If you want to sell your product you must _____ it.
New medicines and instruments ______ every day to extend life.
A red sky in the morning ______ to be a sign of bad weather.
Hundreds of jobs _______ if the factory closes.