For a long time they walked without saying
B, For a long time they walked without saying a word.Jim was the first to break the silence "word"可数，必加 “a" or "the",但"the"是特指不能用，意思是没说一个词，不是没说那个词，所以用"a". to break the silence, 打破（那种）沉默，用“the".不可数，不能用‘a’也不能空。
