Animals
Food
Money
Time
Home
100

It's raining cats and (blank)

dogs

100

I'm going to relax and just be a couch (blank)

potato 

100

(blank) is money

Time

100

I was in the wrong (blank) at the right time

place

100

When one (blank) shuts, another one opens

door

200

The early bird catches the (blank)

worm

200

I don't like opera music, it's not my cup of (blank)

tea

200

Be careful with my camera, it cost me an arm and a (blank)

leg

200

Even a broken (blank) is right twice a day 

clock

200

The (blanks) are on but no-one's home

lights

300

He's the black (blank) of the family 

sheep

300

You can't make an (blank) without breaking some eggs

omelette 

300

Printer ink is worth it's wright in (blank)

gold

300

Be careful, better (blank) than never

late

300

To get a good job, first you need to get your (blank) in the door

foot 

400

Curiosity killed the (blank)

cat

400

The exam was easy, it was a piece of (blank)

cake

400

This money is burning a hole in my (blank)

pocket

400

Time flies when you're having (blank)

fun

400

Home is where the (blank) is

heart 
500

Nobody wants to talk about the (blank) in the room

elephant

500

Sometimes I feel like a (blank) out of water

fish
500

If you pay (blanks) you get monkeys

peanuts

500

I only see my family once in a blue (blank)

moon

500

Rents are going through the (blank) in this city

roof