The students _____ are hard-working and ready to help others should be praised.
In 1965, a new Voting Rights Bill became law, ________all black people had the right to vote from then on.
-----Where was it________the road accident happened yesterday?-----In front of the market.
All ________is needed for life on board the submarine comes from the ocean.
Your pen________smoothly. Where did you buy it?
All of people in the world should enjoy equal treatment, ________race, religion or sex.