Health is important to us. We should have more vegetables and fruit and we shouldn’t eat _____ junk food.

----Why do you speak in _________ a loud voice?----Because I want to make myself ________ clearly. 

He is a singer and an actor _____.

— Did you find the small village yesterday?  — Yes, without any difficulty, for it has ______ changed over years. 

-- Is air the lightest thing in the world?-- Not            . Scientists from Zhejiang University have just developed the world’s lightest material.