a broad variety of

a bucketful of

a bucketload of

a bunch of

a bundle of

a bundle of joy

a bundle of nerves

a cadre of

a call for

a cappella

a cascade of

a case in point

a case in question

a cast of characters

a cast of people

a cavalcade of

a certain amount of

a change is as good as a rest

a chip off the old block

a chip on + Posesivo + shoulder

a choice of

a city of

a click away

a cloud no bigger than a man's hand

a cloud of

a cluster of

a clutch of

a cog in the machine

a cog in the wheel

a collection of