Mrs. White showed her students some old maps from the library.
______a terrible storm would take place in Hainan.
Though we take a great risk of investing in the project, yet it will ______ in the long run.
Although a teenager, Fred could not resist ______ what to do and what not to do.
The child is much too young; I object ______ him alone at home.
We are bound ______ with difficulties in carrying out this research.