Curiosity ... the cat.
Curiosity KILLED the cat.
Actions ... louder than words.
Actions SPEAK louder than words.
I'll be glad to see the ... of him.
I'll be glad to see the BACK of him.
... your tongue.
BITE your tongue.
... the hatchet.
BURY the hatchet.
At the ... of a hat.
At the DROP of a hat.
It's a ... in disguise.
It's a BLESSING in disguise.
It's a ... of cake.
It's a PIECE of cake.
... the hook.
OFF the hook.
She's a ... horse.
She's a DARK horse.
Take it with a ... of salt.
Take it with a GRAIN of salt.
The ball is in your ....
The ball is in your COURT.
As ... as a rock.
As SOLID as a rock.
Once in a ... moon.
Once in a BLUE moon.
The best thing since ... bread.
The best thing since SLICED bread.
Burn the ... oil.
Burn the MIDNIGHT oil.
Let's ... the knot.
Let's TIE the knot.
Bite off more than you can ....
Bite off more than you can CHEW.
A leopard can't ... its spots.
A leopard can't CHANGE its spots.
It's a ... in the bucket.
It's a DROP in the bucket.
I ... a rat.
I SMELL a rat.
Don't put all your eggs in one ....
Don't put all your eggs in one BASKET.
Feeling ... the weather.
Feeling under the weather.
Sit on the ....
Sit on the FENCE.
Close, but no ....
Close, but no CIGAR.
... on the bandwagon.
JUMP on the bandwagon.
Cross that ... when you come to it.
Cross that BRIDGE when you come to it.
It's the ... of both worlds.
It's the BEST of both worlds.
Every cloud has a ... lining.
Every cloud has a SILVER lining.
You're ... up the wrong tree.
You're BARKING up the wrong tree.
Let ... dogs lie.
Let SLEEPING dogs lie.
Kill ... birds with one stone.
Kill TWO birds with one stone.