我在公园散步时突然想到了解决办法。
The solution ___hit me while I was walking in the park.
我正凝视着窗外,突然意识到了真相。
I was staring out the window when the realisation ___hit me.
当我看着那张旧照片时,一阵回忆突然涌上心头。
As I looked at the old photograph, a flood of memories suddenly ___hit me.