Five fledgling sea eagles 是复数,因此BCD不能选,
raised since transplants from
Norway began in 1975.
的时态是完成时态,所以不能选E
it指代的是fledgling sea eagles则不对,因为fledgling sea eagles为复数,而it为单数。
it不能指代句子,只有在两种情况下可以指代句子,那就是it that (eg:it is said that) 和it作形式主语+to do形式。
i
-- by 会员 15823942525 (2010/10/18 22:06:00)