Recently, a new research has suggested the possibility in a popular magazine ______ pleasant smells might reduce pain.
“Don’t talk in class again ”, the teacher said to him . The teacher ________.
We had ____ fun at Mary’s birthday party last Sunday.
On hearing his son’s survival, the worried mother _______
He behaves _______ he were better than us.
The question of drug-taking is bound to(一定要) ______ at the next conference.