What do the police think about the murder?— I’m not sure. But I want anyone who ______ the clue to contact the police actively.

There is ______ word in the dictionary.

Are Mr. and Mrs. Black at home? — No. ________ of them are at work.

I’ve become good friends with several of the students in my school __________ I met in the English speech contest last year.

Eddie is eight years old, but we have seven candles only, we need ________ candle.