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题库 / Prep2007E2-SC-73
Radiocarbon dating of fossils taken from caves on islands along southeastern Alaska's coast suggest that at least a portion of the area was remaining ice-free during the last ice age.
suggest that at least a portion of the area was remaining
suggest at least a portion of the area remaining
suggests that at least a portion of the area remained
suggests at least a portion of the area that had remained
suggests at least a portion of the area to have remained
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Radiocarbon dating of fossils 核心词是dating，表示对化石的碳放射性追溯，of表示动作的对象。
A. B. 主语radiocarbon dating，谓语应为suggests，排除。
C正确
D
E To do不定式不需要
请问D的错误应该怎么描述？
一是过去完成时没必要
二是suggest that是gmat的固定模式，后面接名词就相当于把这个名字当做核心词，改变意思
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