标题: prep2012 pack1 里的一道SC题 大家来讨论~~ [打印本页] 作者: babyheart 时间: 2012-7-31 15:24 标题: prep2012 pack1 里的一道SC题 大家来讨论~~ Narwhals can be called whales of ice: in icy channels, pouds and ice-shielded bays they seek sanctuary from killer whales, their chief predator, and （开始划线了）their annual migrations following (画线结束) the seasnal rhythm of advancing and retreating ice. A. their annual migrations following B. their annual migrations which follow C. their annual migrations follow D. whose annual migrations following E. whose annual migrations follow 答案是C。 可是我觉得their指代不清啊，可能指的Narwhals, 也可能是killer whales