a number of paintings in the castle are believed___in a firebeing destroyedhaving been destroyedto be destroyedto have been destroyed
问题描述：
a number of paintings in the castle are believed___in a fire
being destroyed
having been destroyed
to be destroyed
to have been destroyed
答
to have been destroyed
答
to have been destroyed
are believed 后加to 表示一种既定状态
答
to have been destroyed
完成时的被动
答
having been destroyed
很多在城堡里的画作被普遍认为已经在火里毁坏了，用现在分词的完成式作伴随状语~