I was taken aback

Abide by your principles

Abide by your promise

In abject poverty

He was able to combine business with pleasure

All aboard!

About the same time

Forget about it!

I know nothing about it

I will think about it

It is about time

Just be quick about it!

Keep mum about this!

No doubt about it

No one has a certainty about tomorrow

Talk about luck

We will see about that!

What about me?

What were you about to say?

Above all

Above suspicion

Rumors are abroad

Absence makes the heart grow fonder

It is the absolute truth

Absolutely not!

Absolutely!

Absolutely nothing!

How absurdly ridiculous!

Please accept my condolences

It is no accident

Mission accomplished!

Everyone lives according to his means

According to schedule

Under no circumstances

Everyone is accountable for his actions

By all accounts

By a hair's breath

I have an ace in the hole

You hold all the aces

I ache all over

It is an acid test

Act your age

In the act

He acted in bad faith

It is time for action

Actually it was not so

I would not know him from Adam

Do not add fuel to the fire

May I add my two cents worth?

He is a bootlicker

She is the apple of his eyes

I am terribly (or awfully) sorry

That is an awful lot of money

Wipe your tears away

There is no use in crying

Auricularly

Opposites attract

He is addicted to drugs

He is addicted to gambling

No adjective necessary

In the late afternoon

The evil that men do lives after them

Time after time

No need to be afraid

All in good time

All is fair in love and war

It is all part of the game

It is not all that bad

Of all the nerve!

The sun shines equally on all

We are all in the same boat

With all means at hand

With all my heart

No strings attached

He cried like a baby

Back and forth

I had back luck

You scratch my back and I will scratch yours

He backed out

The charge (or scheme or plot) backfired

Neither forward nor backward

She brings home the bacon

Do not let the cat out of the bag

It is in the bag

Birds of a feather

I killed two birds with one stone

Far too good

That is too bad!

You are barking up the wrong tree

The dream has come true

As like as two peas in a pod

I felt like two cents

Just between the two of us

Two is company, three is a crowd

Two heads are better than one

In the twinkling of an eye

It is a real pleasure

You may rest assured

Go jump in the lake!

It runs in the family