如果你试着回想，你可能记起他说的确切话语。

If you ___cast ___your ___mind ___back, you might recall the exact words he said.

当我听到那首歌时，我试着回想起我们的暑假。

When I hear that song, I ___cast ___my ___mind ___back to our summer vacation.

为了解决这个谜团，他必须试着回想起事发当晚。

To solve the mystery, he had to ___cast ___his ___mind ___back to the night of the incident.