我们有必要在图书馆保持安静.It's ___________to_________the library.
问题描述:
我们有必要在图书馆保持安静.It's ___________to_________the library.
答
It's necessary for us to keep/be quiet in the library.
我们有必要在图书馆保持安静.It's ___________to_________the library.
It's necessary for us to keep/be quiet in the library.