Please don't forget ________ to me, will you?

1. A.
   to write
2. B.
   to writing
3. C.
   writing
4. D.
   write

Please don't stand up in class until you          .

–please don’t forget _______ the window when you leave.
--OK.

—Please don’t  touch that fish.It smells _______.
—OK，I won’t.