---I hear Tom is working at history very hard.

---I'm ________ he will pass the history exam this time.

1. A.
   afraid
2. B.
   surprised
3. C.
   sure
4. D.
   sorry

—I hear Tom is working at history very hard.

—I’m ______ he will pass the history exam this time.

A. afraid                     B. surprised         C. sure                D. sorry