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
during the last ice age不是完成时的代表吗？为什么答案是C 过去时态呢 求解？？？
| 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2011-10-2 04:56:13
收藏
收藏
楼主
发表于 2011-10-2 09:03:18
