70. A President entering the final two years of a second term is (likely to be at a severe disadvantage and is often unable to) carry out a legislative program. C. liable to be severely disadvantaged and cannot often D. liable that he or she is at a severe disadvantage and cannot often 这个题对于ets对c/d的解释看的非常的不明白。In C and D, cannot often carry out suggests that a President with limited time suffers only from an inability to achieve legislative goals frequently, not from a frequent inability to achieve them at all. 不过gg告诉我说cannot感觉上主动性更强,而unable似乎强调一种不能,更倾向于外 部 。比如说你处于一种不利情况,一般你不会说我can't do什么,实际上,你出于有利 情况时,才说can't do.