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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
麻烦各位大牛牛啦~
PS需要PREP 2012 pack1的战友,可以看这里: http://forum.chasedream.com/GMAT_Guide/thread-736221-1-1.html |
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