--Recent years have     rapid changes of my hometown.
--Yes, I could hardly recognize it when I arrived yesterday,

--Mary’s crying sadly in her room. Why must you say so to her?
--I know I’ve hurt her, but it wasn’t my      .

As it has never been held in Asia, ___2010 Shanghai World Expo will be  honour for all of the Asians.

The director had her assistant ___ some hot dogs for the meeting.

This was ____ anyone had previously sailed alone.