He is feigning ignorance about that problem.

This cold is unbearable.

He is a disciple of a famous painter.

He knows that pain through his own experience.

I have no way of knowing what he is thinking.

He is working hard to make his abilities known to the world.

He was wearing a kimono with a mon proudly.

In order to understand his feelings, I had a deep conversation with him.

It's no big deal if he's a little late.

God only knows what he is thinking.