He realized she was crying his words.A. becauseB. because ofC. asD. since

问题补充：

He realized she was crying his words.

A. because

B. because of

C. as

D. since

答案：

A. because

(答案→)B. because of

C. as

D. since

解析：考查because 和because of，意思都是因为，because引导句子，而because of引导名词或名词性短语，as意思“作为”，since意思“自从…”，句子意思“他意识到因为他的话她就哭了”，所以选B