He tried to work in the government in order to get _______ to the useful information.

—I am afraid this pair of shoes is a little expensive．—If you really want to buy them, I will give you a ____ of 10 percent．

It is widely accepted that animals learn to do things because their certain acts lead to _______.

Now that taking exercise will build up your       , you should try to run in the morning.

. After so many days on the way, even Charles cheered up at the _____ of the food.