Mind your ______; thank your friend when you leave the party.

It is always true that sometimes even if you have had a big dinner, _________ are that you will still want to reach for food when it gets late． 

—Who did you stay with ?—______ .                           

Although dragon doesn’t exist, we still take it as a _______ of our nation. 

Tom was searching hard in the classroom in the ___ of finding his lost exercise book.