to act as opponent

to act on instinct

Act your age!

to act like a prima donna

to act as a pagan

to act from necessity

acting at the request of a customer

[Action] is the last resource of those who know not how to dream.

no action shall lie against the company

Actions speak louder than words

He acts the innocent

Actual life was chaos, but there was something terribly logical in the imagination.

in actual fact

He actually did it

actuarial reserves declared in the balance sheet

adapt oneself to the company

to adapt a novel for television

to adapt oneself to circumstances

to add insult to injury

to add up figures

to add a remark in parentheses

to add fuel to the fire

to add fuel to the flames

to add fresh fuel to a quarrel

added to which