section a-a a-a

A friend in need is a friend indeed

A-A-A conjugation structure

S-A(A-A) missile

A.A.A.

a bull in a china shop

A fire in a building

a friend made in hospital or people who become friends in hospital

A in terface

a picture-in-a-picture option

a round peg in a square hole

a sound mind in a sound body

a square peg in a round hole

a storm in a teacup

a tempest in a barrel

a tempest in a teapot

a young man in a hurry

A+A^2O process

A-1A