There are some health problems that, when ________ in time, can become bigger ones later on.
Mr. Black has been teaching English in a middle school _____ he came to China.
I know you are very _____ ice-cream, but you will gain weight if you eat too much.
She is the most _____ one of my friends; you can just depend on her.
Ladies and gentlemen, please fasten your seat belts. The plane _____.
Here are Daphne and David; _____ is my brother.