Li Hua’s answer ________ right. Don’t you think so?

Jack often _____ music after class. 

The shoes were worn out, what’s more, they aren’t worth _____. 

 —Can they ______ Chinese?—Yes, they can, but ______.

--- What’s the matter, Mary? You looked upset.--- I failed again in my math exam. I’m really sorry because I don’t want to ____ my parents down.