a. a series of books

d. a fleet of starships

h. a cluster of stars

l. a pile of clothes

p. a pair of shoes

b. a gang of thugs

e. a group of islands

i. a troop of soldiers

m. a lot of money

q. a stack of pancakes

c. a collection of coins

f. a crowd of sports fans

j. a panel of experts

n. a set of dishes

r. a pack of gum

g. a bundle of sticks

k. a bunch of grapes

o. a crew of sailors