How old is Steve—He is ____________ and he has an ___________ sister.

(2013·湖南长沙四校二模)—Is the letter from your mother?—Yes.But she ________the letter herself，because she doesn’t even know one word.

He felt _________ when he found a stranger_________ about at the gate of the police station.

Keys ______ used for ______ the doors.

My bike is broken. What should I do— You can get it in that bike shop.