瑞典曾是一个强大的王国。

Sweden was once a powerful ___kingdom.

古埃及王国留下了非凡的纪念碑。

The ancient ___kingdom of Egypt left behind remarkable monuments.

尽管现在是一个现代民主国家，联合王国仍保留其作为王国的历史称号。

Though a modern democracy now, the United Kingdom retains its historic title as a ___kingdom.