--_____ to the United States? --No, never. But I went to Canada a few years ago.
---Can you help me my math homework, Miss Zhang? ---OK. Come to my house Sunday morning.
---What’s your favorite ? ---Pears.
---Are Bob’s pens ____ the pencil case? ---Yes, _____ are.
---Is this ________ dictionary? ---No, _____ isn’t _______ dictionary.
---How much ______ the blue socks? ---_________ three dollars.