题目

Nothing that he suggested _____ to be of any use. A. prove      B. proved       C. proving       D. to prove 答案：B人是通过下列哪种方式感染血吸虫的？( )A. 吃了米猪肉 B. 食未熟的鱼 C. 蚊虫叮咬 D. 接触有钉螺的水域