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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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