We students should treasure the short se

问题选择题

We students should treasure the short senior school’s study life of three years. Once ________, the opportunity can’t get back.

A．losing

B．was lost

C．lost

D．being lost

答案

题目分析：考查状语从句的省略：句意：我们每个学生应该珍惜短暂的三年高中学习生活，一旦失去了，机会不再来。Once引导的是条件状语从句，是省略句，完整的是once the short senior school’s study life is lost，主从句主语一致的时候，主语和be动词可以省略，选C。