73. (28441-!-item-!-188;#058&003975)
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
ans : C
請問 a least a portion 是跟 at least a portion 一樣意思嗎?
先謝了~