15. When Madam Curie did the experiment again, she was more careful where she _____ a mistake.
"Can't you read?" Mary said _____ to the notice.
He never let himself _____.
If _____ green, the door might look more beautiful.
Did you notice the little boy _____ away?
-Who were those people with the banners? -A group _____ itself the League For Peace.