The driver looked over the engine carefully lest it _____ on the way.
A、breaks down
B、broke down
C、would break down
D、should break down
【正确答案】：D
【题目解析】：D look over 检查； engine发动机； lest 以防，万一；lest 引导的目的状语从句中用虚拟语气：should + 动词原形。其他还有for fear that, in case引导词。
