Question

This problem may lead to more serious ones if_______ unsolved. A．making B．left C．remained

This problem may lead to more serious ones if_______ unsolved. A．making B．left C．remained D．keeping

Answer 1

B

试题分析：考查状语从句的省略句：句意：这个问题可能或导致更严重的病如果被任由不治疗的话。If left unsolved="if" the problem is left unsolved，如果主从句主语一致的时候，可以省略从句的主语和be动词，选B。