Words ________ me when I wanted to express my thanks to him for having saved my son from the burning house．

A.failed

B.left

C.discouraged

D.disappointed

答案及解析： A

解析：

fail这里的意思是：not be enough for（sb．）不足；短少。Words fail me的意思是：I can't find words to describe my feelings．我无法用语言来表达我的感情。