The problem __________, they went home. being solved B. has been solved C. been solved D. has to beThe problem __________, they went home. being solvedB. has been solvedC. been solvedD. has to be solved求详细解答啊.
问题描述：
The problem __________, they went home. being solved B. has been solved C. been solved D. has to be
The problem __________, they went home.
being solvedB. has been solvedC. been solvedD. has to be solved
求详细解答啊.
答
你确定你选项没错？
应该填solved,独立主格结构。非谓语solved它的逻辑主语不是句子的主语，所以在它前面加自己的逻辑主语The problem，他们之间是被动且完成的关系，构成独立主格结构。“这个问题被解决之后，他们就回家了”
答
选B
是现在完成时的被动语态。
由they went home.可知他们已解决问题，回家了。
答
独立主格的被动结构，所以选a.意思是，问题解决了，他们就回家了。
答
选B
A是正在被解决，显然不对。B是现完，已经被解决了。C中be动词不应该是原形，单纯被动应该是was solved。D意思是需要被解决，意思错误。希望对你有帮助：）
答
being solved
The problem _being solved_(这是独立主格结构作状语表示时间）,they went home.
=When the problem was solved,they went home
答
c