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
可是SUGGEST + THAT + V (原型)吗
我因为这个..一下就从C D E里面把C删了....选了E......虽然HAVE REMAINED 这个时态不是很多...但是 我也见过...... | 
