[求助]旧prep2，73

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

这题开始还以为是打错了，后来看解释也是a least，这太扯了，a是修饰谁的？？least不能是名词吧？是也说不通啊。。。

嗯，希望如此。。。不然很难解释