With all his attention ______ on his experiment, he has no time to spend with his family.
It was in the village _____ we used to live ______ the film was made.
_______ for several weeks, the city was short of food and clothing.
We walked as fast as we could, _______ to catch the 9:30 train.
It is essential that every child _______ the same educational opportunities.
The scientists are beating their brains trying to _______ a solution to the problem.