30. In some countries, treatments for A(H1N1) flu were neither ________ nor effective, and many patients died because of infection.
Some of the heat near the surface of the earth _____ electricity.
_______we’ll go camping tomorrow depends on the weather.
It worried her a bit_______her hair was turning grey.
As we all know, Asia is_______ Europe.
Tom_______two of his classmates_______invited to the party.