Question

Only when 1 was fourteen__________the importance of study． A．I realized B．did I realize C

Only when 1 was fourteen__________the importance of study． A．I realized B．did I realize C．had I realized D．I had realized

Answer 1

B

句意：只有当我14岁时，我才意识到学习的重要性。Only修饰状语when位于句首时需使用部分倒装，本句的时态应使用一般过去式。