William found it increasingly difficult to read,for his eyesight was beginning to ___.

题目

William found it increasingly difficult to read,for his eyesight was beginning to ___.
A.disappear B.fall C.fail D.damage
B和C的区别

答案

C
fall 不及物动词,可指进入某种状态.
fail 及物动词或及物动词,在这里指衰退.