For the following questions (1 to 15), choose a, b, c or d.

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1I can’t find my keys. I don’t know where ____ are.
a.  
b.  
c.  
2A: “Is he a teacher?” B: “Yes, he _____.”
a.  
b.  
c.  
3A: “_____ brush your teeth?” B: “Three times a day.”
a.  
b.  
c.  
4We _____ have friends over for dinner.
a.  
b.  
c.  
5That’s _____. It’s very expensive.
a.  
b.  
c.