Jim’s mother was shopping ________ hermobile phone rang.

Everyone knows that _____ sun is in the center of thesolar system（太阳系）

It was________that I read in your February issue the letter to the editor written by Prof.Johnson[ ]

I called you 10:30 p.m, but you didn’t answer it.—-I _____my work and ______a bath.[ ]

you read it , you can’t imagine how moving the story is .