伊丽莎白二世于1952年登基。

Elizabeth II ___ascended ___the ___throne in 1952.

国王的长子是王位的第一顺位继承人。

The king's eldest son is next in line to inherit ___the ___throne.

这部小说探讨了身居王位进行统治所面临的挑战。

The novel explores the challenges of ruling from ___the ___throne.