A diamond in the rough A drop in the bucket A frog in one’s throat A piece of cake A shot in the dark Achilles’ heel An arm and a leg An eye for an eye Apple of your eye Armed to the teeth As cool as a cucumber At the drop the a hat At the eleventh hour Back to square one Backseat driver Ballpark figure Balls in your court Beat around the bush Behind the eight ball Better half． Big wig Bite ones lip Bite the bullet Black sheep Blessing in disguise Bom yesterday Break a leg Bum the midnight oil Bury head in the sand Butter up Catch some Zs Catch-22 Chew the fat Chicken feed Chip offthe old block Close， but no cigar Cry in ones beer Double whammy Down for the count Eagle eye Eat ones hat Eat ones heart out Eat ones words Egg on ones face ……
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