These problems,______ will seriously affect the growth of teenagers and even the nation's future.
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.