伦勃朗是她最新小说的主题人物。

Rembrandt is the ___subject of her latest novel.

我们在画廊里讨论一幅画的主题人物。

We were discussing the ___subject of a painting in the gallery.

这部传记的主题人物是一位著名的历史人物。

The ___subject of the biography is a famous historical figure.