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.
(A) suggest that at least a portion of the area was remaining
(B) suggest at least a portion of the area remaining
(C) suggests that a least a portion of the area remained
(D) suggests at least a portion of the area that had remained
(E) suggests at least a portion of the area to have remained
答案是C suggest不是可以说是suggest sth.吗?那D 要不是had 时态错是不是就应该是对了?
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