We should do what we can to save those _____ species, including the tiger, an animal which was considered _____ to humans.
If better use is _______ your free time, you’ll make greater progress in that.
The old pianist wouldn’t listen to our repeated request that he _______ in public again.
The army officer _______ his men to fire as soon as the enemies came up.
--- I hear a number of workers in the factory ______ out of work. --- Yes, and the number _______ quite huge.
Many students believe the choice of their universities should _______ their own interests.