语法与词汇 3.If John_____to the university, he would have to work hard.
【正确答案】 B
【答案解析】虚拟语气。if引导的非真实性条件句,当从句表示将来不大可能实现的条件时,从句用“If+主语+were to do”结构,主句使用“主语+would do”结构。