---There must be a dozen pens in this house but I can never find one when I need one. --- Keep looking. ____ is sure to turn up.
He is always _______ his excellent spoken English; while his sister takes _______ her beauty.
In the last ten years, they _______ three great scientific experiments.
Look! Tony, your books are everywhere. Please put them _______ .
-Are you feeling _______ now? -Yes, and I feel much happier than ever.
-Hi, Wang Ling, can't you recognize me? -Oh, Ma Yan!I ________ you ________ your sister. It's so nice to meet you here!