0G上70 题的一点问题。

qww

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.
A.    likely to be at a severe disadvantage and is often unable to
B.    likely severely disadvantaged and often unable to
C.    liable to be severely disadvantaged and cannot often
D.    liable that he or she is at a severe disadvantage and cannot often
E.    at a severe disadvantage, often likely to be unable that he or she can
Choice A is best. Choice B lacks the necessary infinitive after likely. In B and C, disadvantaged, which often means "hampered by substandard economic and social conditions," is less precise than at a disadvantage. 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. In C, liable, followed by an infinitive, can legitimately be used to express probability with a bad outcome, but C is otherwise flawed as noted. D's liable and E's unable should be followed by an infinitive rather than by a relative clause beginning with that.
请问在解释中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.具体是什么意思，不理解。多谢！！！

dreadpower

就是说cannot often意思是不能经常（有时还能），be often unable to意思是经常不能（几乎不能），程度不同。

    often这种词的位置不能轻易改变

qww

多谢