Be careful with the knife, ______ you’ll be hurt.

Be careful with that knife, or you'll cut ________．

1. A.
   himself
2. B.
   ourselves
3. C.
   yourself
4. D.
   themselves

Be careful with your spelling. There is ________ “n” in the word “hundred”.

1. A.
   a
2. B.
   an
3. C.
   the
4. D.
   /