C219 Something Happened!

When had he reviewed? When had he tackled a similar problem?

He just couldn't recall.

It was as if one second, a person is set on doing something, and the next, they're frozen, unable to remember what that thing was.

That's exactly how Chen Yanguan felt at the moment.

He couldn't for the life of him remember where he had come across these familiar concepts. And it was language arts, after all