这座塔被归类为历史纪念碑。

The tower is ___classed ___as a historic monument.

综合考虑，这一天可以被归类为成功。

All things considered, the Day could be ___classed ___as a success.

这种新物种被科学家归类为濒危物种。

The new species was ___classed ___as endangered by scientists.