Question

10. There used to be a tall building here. But it is said        in a big fire two years ago. (destroy)

过去，这里有一栋很高的楼，但据说它被毁于两年前的一场大火中。

Answer 1

10. to have been destroyed 不定式的完成时用作主语补足语，表其动作发生在is said之前。