Verified answer

Resposta:

a. who (formal) or that (casual)

b. who (formal) of that (casual)

c. who (formal) of that (casual)

d. where

e. where

f. where

g. which (formal) or that (informal)

h. whose

i. to whom

j. whose

k. who (formal) or that (informal)

l. who (formal) or that (informal)

m. that

n. who (formal) or that (informal)

o. where

p. whose