The flowers his friend gave him will die unless __________ every day.
She was over the age limit and ________, her application for the job was rejected.
After five years of preparation, Shanghai is presenting the world _______ many say is the greatest Special Olympics.
Scientists are trying to develop a special material, _______ they will make use of in space.
The education of _______young is always _______ hot and serious topic in modern society.
--- It shouldn’t take long to clear up after the party if we all volunteer to help. --- That’s right. _____________.