Animals
Food
Money
Time
Fire
100

It's raining cats and ... . 

dogs

100

It is a hard ... to crack. 

nut

100

... is money. 

Time

100

I was in the wrong ... at the wrong time

place

100

There’s no smoke without ... . 

fire

200

The early bird catches the ... . 

worm

200

I don’t like opera music, it’s not my cup of ... .

tea

200

This money is burning a hole in my ... . 

pocket

200

Even a broken ... is right twice a day.

clock

200

Fight fire with ... .

fire

300

He is the black ... of the family.

sheep

300

The exam was easy, it was a piece of ... .

cake

300

There’s no such thing as a free ... . 

lunch

300

Time flies when you’re having ... .

fun
300

My suggestion didn’t help, it just added ... to the fire

fuel

400

Curiosity killed the ... . 

cat

400

It’s no use crying over spilt ... . 

milk

400

Printer ink is worth it’s weight in ... . 

gold

400

I only see my family once in a blue ... .

moon

400

I’ve been burning the ... at both ends

candle

500

Nobody wants to talk about the ... in the room. 

elephant

500

I’m going to relax and just be a couch ... .

potato

500

Be careful with my camera, it cost me an arm and a ... . 

leg

500

I think ... will freeze over before that happens.

hell

500

I got my ... burned when I tried playing the stock market

fingers