19.        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

答案：A

我选了C。 be likely to 和 be liable to 有什么区别吗？oftern can't 和 cannot often 又有区别吗？

be likely和be liable 意思一样，但at a severe disadvantage  和severely disadvantaged意思不一样，

前者指“处于劣势”，后者指“境遇悲惨”