The conflict had developed into a stage ______ the two countries were gathering big troops on the border.
This is an unpleasant subject _______ we might argue for a long while.
Most parents forbid their children_______ much time TV. They think it's a waste of time.
He_______ his students lessons though he was not feeling well.
It was 8 o'clock and she was _______ to find the boys who were not at home.
The road_______ for vehicles is under repair. Drivers are required to take some other routes.