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1: Scientists claim that the discovery of the first authenticated mammal bones in amber could provide important clues of determining, in addition to how, when mammals colonized the islands of the West Indies.
A: of determining, in addition to how, when mammals colonized the islands of the West Indies
B: in the determination of how and when the islands of the West Indies were colonized by mammals
C: to determine how mammals colonized the islands of the West Indies and when they did
D: for determining when the islands of the West Indies were colonized by mammals and how they were
E: for determining how and when mammals colonized the islands of the West Indies
是不是大家都选E啊? C的to do不是更好吗? 
28-31: Many of the earliest known images of Hindu deities in India date from the time of the Kushan empire, fashioned either from the spotted sandstone of Mathura or Gandharan grey schist.
A: empire, fashioned either from the spotted sandstone of Mathura or
B: empire, fashioned from either the spotted sandstone of Mathura or from
C: empire, either fashioned from the spotted sandstone of Mathura or
D: empire and either fashioned from the spotted sandstone of Mathura or from
E: empire and were fashioned either from the spotted sandstone of Mathura or from
and前后可以时态不一致吗? |