The scientific research on how to protect the rare animals is ________. Many scientists are working hard to find new way to raise the animals by man.
Some parents are just too protective.They want to _______ their kids from every kind of danger,real or imagined.
--- ________ I remind you of is to return the book to our English teacher. ---I will give it to him _________ I see him.
We ______very early so we packed the night before.
He was in ____ mood for a song as his income was on _____ increase.
—Sorry, sir. I can’t answer this question. ---Well, you are supposed______ this part of history.