Prices ________ all the time and no one knows when they ________ stable.[ ]

Don’t worry ____ her. She isn’t young ______.

on’sstory proves that to be a hero has nothing to do with size, ________ with asmart mind and a brave heart.

I have a sore back. You should _____ down and rest.

I’m not a teacher in this school．I _____ until a new teacherarrives．