Q8:
The 32 species that make up the dolphin family are closely related to whales and in fact include the animal known as the killer whale, which can grow to be 30 feet long and is famous for its aggressive hunting pods.
include the animal known as the killer whale, which can grow to be 30 feet long and is
include the animal known as the killer whale, growing as big as 30 feet long and
include the animal known as the killer whale, growing up to 30 feet long and being
include the animal known as the killer whale, which can grow as big as 30 feet long and is
include the animal known as the killer whale, which can grow to be 30 feet long and it is
答案是A，我选的D
请教各位NN
grow to be as...as 比grow as... as ..更好吗？
can一定要加吗？ | 
