谢谢Kiwi和sisi的解释。
发现考理解句义的时态的题还是挺多的(不幸的是还经常错)。
OG SC76题又是一道这样的题。
Combining enormous physical strength with higher intelligence, the Neanderthals (appear to have been equipped to face any obstacle the environment could put in their path), but their relatively sedden disappearance during the Paleolithic era indicates that an inability to adapt to some environmental change led to their extinction.
括号内是正确答案。
我原以为Neanderthals已经不存在了,所以应该用过去时appeared, 但是正确答案是appear to have been. 这个appear to have been 要怎么理解呢?现在appear以前have been,,,,我已经晕掉了。
-- by 会员 MsL (2013/2/25 16:30:57)