a. a troop of soldiers

d. a pile of clothes

h. a series of books

l. a collection of coins

p. a pair of shoes

b. a cluster of stars

e. a stack of pancakes

i. a group of islands

m. a pack of gum

q. a panel of experts

c. a fleet of starships

f. a crowd of sports fans

j. a gang of thugs

n. a bunch of grapes

r. a bundle of sticks

g. a set of dishes

k. a crew of sailors

o. a lot of money