--- Why don't you try to do exercise to lose weight?--- I have tried everything but it has made little ______.

It is the _______in the country to go out and pick flowers on the first day of spring.

The church has______ quite a few changes over the years.

In dealing with public relations，we should make every effort to prevent the_______in personality.

NASA has made a ________ that our earth has no threat associated with the film 2012 which is based on pure myths.