Being aware of the__________of the disaster, some famous stars organized a charity concert to raise money for the victims.

The coin was almost worthless. So it was of small ________.

The headmaster is to give a formal_______ at the annual ceremony.

---Mary was being badly treated when John happened to pass by and helped her out ---I think it was not a pure______but had been well planned.

Professor Li has earned a world ____ with his pioneer research in biochemistry.