I haven’t started writing my novel yet—I am still waiting for ______.

——-Shall we go out for a walk?——Sorry. This is not the right ____ to invite me. I am too tired to walk.

Hardly a month goes by without ______ of another survey revealing new depths of scientific illiteracy among US citizens.

. A(n) _____ of achievement clearly has an influence on children’s early education.

 One thousand dollars a month is not a fortune but would help cover my living __________.