We have to solve this problem now, so let put our thinking caps on.

(a)  

Instead of studying hard before the test, he spent all of last week goofing off.

(a)  

He learnt a lot in the school of hard knocks, it taught him a lot about life.

(a)  

You definitely deserve an A for effort cause you put so much work into the competition.

(a)  

He seems never to know what tiredness is, and he is really an eager beaver.

(a)  

He asked me for my phone number and I drew a blank - I just couldn't remember it.

(a)  

The argument is a red herring. It actually has nothing to do with this issue.

(a)  

Though they are twins, their characters are as different as chalk and cheese.

(a)  

His efforts frequently went beyond the call of duty.

(a)  

She's received a pat on the back from her boss from her boss from the new project that she has finished.

(a)  

Its challenging to make ends meet with a big family, but surprisingly they can manage.

(a)  

Her business has been in troubled waters due to Covid-19.

(a)  

Every having a cup of coffee in the morning makes him be so full of beans.

(a)  

She's smart, thoughtful and kind in a nutshell.

(a)  

She is always the apple of her father's eye.

(a)  

Thanks for giving us lots of food for thought!

(a)  

He is such a couch potato.

(a)  

Team A proved that they are the cream of the crop by achieving the top award.

(a)  

She was cool as a cucumber as if nothing happened.

(a)  

He is bouncing off the walls cause he can't wait to start his new job

(a)  

He is so proud of her daughter. She is as bright as a button.

(a)  

Depending on what you bring to the table, we could win this game.

(a)  

I can't go to the party cause I'm having a lot on my plate.

(a)  

He hit the ceiling/roof when he knew she cheated on him.

(a)  

Everything she said was music to his ears.

(a)  

He was under a cloud after people found him be with the victims last night.

(a)  

I know him inside out.

(a)  

Curly hair seems to run in that family.

(a)  

They decided to keep the first idea after chopping and changing in 3 months.

(a)  

Tim and his older brother had a falling-out years ago. They haven't spoken to each other since then.

(a)  

I'm a little bit tired now. Let's call it a day.

(a)  

I'm having a performance tonight.

-Break a leg!

(a)  

She resolves to turn her life over a new leaf.

(a)  

Losing that job was a blessing in a disguise because it gave him lots of time to think about his life.

(a)  

Cut me some slack and I'll finish the task by Monday.

(a)  

It's 2 AM now. I think we'd better hit the sack.

(a)  

She got bent out of shape because of the way she was treated.

(a)  

I'm trying to wrap my head around that math problem.

(a)  

I don't want to ask the question, but it is the elephant in the room.

(a)  

Do you mind if I put our date on ice for a few days until I've done my tasks.

(a)  

I feel better now. Thank you for breaking the ice.

(a)  

Getting new job makes me be on cloud nine.

(a)  

He feels as fit as a fiddle after completely recovering from illness.

(a)  

I have designed this handbook for this season. Do you think it would cut the mustard?

(a)  

She always lends a sympathetic ear. She will help you with your problems.

(a)  

She just arrived in the nick of time.

(a)  

What he did was a far cry from what he had said before.

(a)  

I'll be there at the drop of a hat if you need help.

(a)  

I get a kick out of English.

(a)  

I have to fill in for him until he gets back.

(a)  

May be I'll try my hand at tailoring my own clothes.

(a)  

Hope that you can stay with us for the time being.

(a)  

It is very dangerous to jump the lights.

(a)  

Okay, cut to the chase already. What exactly are you trying to say?

(a)  

Smoking is really not my cup of tea.

(a)  

My girlfriend definitely has a sweet tooth. She is really like soft drink.

(a)  

Hey, let's invite him to the party. He is such a barrel of laughs.

(a)  

We are not in the office now. You can let your hair down.

(a)  

I can't tell you anything about him. He's a bit of a dark horse.

(a)