His grandma has ______ for 5 years.

________it is to throw snowballs at each other on the playground after snow!

been told ________ where he lived, Ihad no difficulty in finding Peter’s address.

Green organizations are trying to save rain forests that have been _____ by farmers.

How come your father can read books in German? — Well, he____on a project with some German engineers for 3 years when he was young