What’s favorite subject?

A. he’s B. he C. his D. she

What's ________ favorite subject?

1. A.
   you
2. B.
   your
3. C.
   he
4. D.
   she

—What’s       favorite subject?
—Her favorite subject is math.
　　

1. A.
   Mary　
2. B.
   she’s
3. C.
   Mary’s