The Apollo II astronauts ... of the Earth’s inhabitants witnessed the famous first moonwalk on July 20, 1969, were Neil Armstrong and Buzz Aldrin.
whom
whom millions
were some
whom some were
Pembahasan: Adjective Clause
Kata ganti untuk person: who + P (sebagai subjek) atau whom + S + P (objek).
Bandingkan pilihanmu dengan sobat pembelajar yang lain.