.My brother a__________ a knowledge of computers by careful study. 
.Can you tell me a________ of time if you’re coming?
.I a_________ of your trying to earn some money, but please don’t neglect your studies.
.They a_________ the value of the house at over $250,000.
.I’m d__________ to hear of your success.
.When you find someone hurt, you should perform first a___as soon as possible.
. Why do you value money so much? Is it e__________ to happiness?
.The d_________ air in the room will make food go bad easily.
. He has gone to the hospital for special t___________ because of his high fever.
..Remember to cover the burned area with a dry and clean b_________.