People have planted a lot of trees and grass in order to ____ wind and sand in the desert.
He seemed to have ________from the terrible experience, and looked happier.
—Help! Help! Police ... —________, Madam. What's the trouble?
We smiled ________when Dr. Smith told us Granny’s operation was a great success and that she would recover soon.
She is ________ that we all want to make friends with her.
A modern city has been set up in _________ was a wasteland ten years ago.