He jotted the address down in case he ( )it. A should forget B would forget

问题描述:

He jotted the address down in case he ( )it. A should forget B would forget
为什么? 是 in case 的什么用法?

in case 是“以防万一”的意思,它可以引导句子,表示一种假设;in case of 也是“以防万一”的意思,但它不能引导句子.句意为:他快速记下那个地址,以防忘记.