The ___ look on the girl’s face suggested that she ___ such bad news.

Your story is perfect; I’ve never heard _____ before．

Scientists are increasingly _____ that the earth is getting hotter because of carbon dioxide and other gases. 

Immediately, the people around made_________ to hospital.

---Look, our headmaster is over there, playing basketball with some students of our class. --- Oh, he must be ________ to his students.