LESSON #324: On the ropes, Enough rope to hang yourself
LESSON #323: To learn the ropes, Know the ropes
LESSON #322: To rope someone in, At the end of your rope
LESSON #321: Dog Tired, Go to the dogs, Rain cats and dogs
LESSON #320: Buttoned-down, Buttonhole
LESSON #319: Button Your Lip, On The Button
LESSON #318: Cock and bull story, Cover story, Inside story
LESSON #317: Fish Story, Sob Story, Shaggy dog story
LESSON #316: Scrape the bottom of the barrel, Have someone over a barrel, Give someone both barrels
LESSON #315: All dressed up with no place to go, All the traffic will bear
LESSON #314: All over but the shouting, All hell breaks loose
LESSON #313: All in the same boat, All wrapped up
LESSON #312: Aces high, Ace in the hole, Within an ace of winning
LESSON #311: No brainer, Push the envelope, Cut to the chase
LESSON #310: Penny pincher, Penny-wise, Pretty penny
LESSON #309: Come up for air, Leave up in the air
LESSON #308: Pull out of thin air, Give him the air
LESSON #307: Air your dirty linen in public, Clear the air
LESSON #306: Cut a deal, Raw deal, Shady deal, Sweetheart deal

http://www.voanews.com/vietnamese/englishamericanstyle.cfm