There are many volunteers ______ are helping the children in Sichuan.— And most of them are college students.

I called Mary many times yesterday evening. But I couldn’t get through. Her brother _____ on the phone all the time.

My dad bought me a new MP4 player, but I don’t know 　　　.

He had a burning ________ to win back the teacher’ s confidence in him.

Yesterday evening, I _____ along the street when I suddenly met my maths teacher.