volcano

富士山是一座休眠火山。

Mount Fuji is a dormant ___volcano.

圣托里尼以其火山而闻名。

Santorini is famous for its ___volcano.

这座岛屿是由一座古老的、现已熄灭的火山形成的。

The island was formed by an ancient, now extinct ___volcano.