Besides wildlife on land, there are species living in the oceans _______ we still know little.

He got his first book published.It turnedout to be a bestseller.—When was _______—_______ was in 2000 when he was still incollege.

This picture was taken when my father was a child and even I myself couldn’t _____.

Is the woman _______ singing in the hall you music teacherOh, it ________ be her. She is ill at home today.

ter several rounds of competition, the littlegirl ______ because of her excellent English and quick wit.