______ a light when necessary. You will bring light to other people and yourself.

My headache _________ me. I thought it was going away, but now it’s getting worse.

How long has the train been away?—Sorry. I don’t know. By the time I got here, the train ________.

　Jim　isn’t　in　the　classroom.　Where　is　he？-　He　_____　to　the　teacher’s　office.

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