GWD 关于to be 的问题

lolmandy

The 32species that make up the dolphin family are closely related to whales and infact include the animal known as the killer whale, which can grow to be 30feet long and is famous for its aggressive hunting pods.

1. include the animal known as the killer whale,     which can grow to be 30 feet long and is
   
2. include the animal known as the killer whale,     growing as big as 30 feet long and
   
3. include the animal known as the killer whale,     growing up to 30 feet long and being
   
4. include the animal known as the killer whale,     which can grow as big as 30 feet long and is
   

  E．includethe animal known as the killer whale, which can grow to be 30 feet long and itis










Thecorrect choice is A. I wanna know why D is wrong?

lolmandy

thnx:3
you explanation is quite cogent!

ctkstarcraft

d: include the animal known as the killer whale,     which can grow as big as 30 feet long and is

"as big as 30 feet long" is awkward and a little bit redundant
normally we say "as long as 30 feet, as big as 100 square meters"