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
A中的grow to be 30 feet long 是怎么一种用法啊..
为什么不是grow to 30 feet long. 还有.可以说.grow to 30 feet in long 吗? 这种说法和grow to be 30 feet long 比起来是不是grow to be 30 feet long更好呢..?
C中的 growing up的up是不是redundant? | 
