30. In some countries, treatments for A(H1N1) flu were neither ________ nor effective, and many patients died because of infection.
Two fifths of the police _____ in the school near the town.
.We would like to go and thank him ourselves, but we _____ out his address yet.
Was it because it snowed last night ____ he didn’t come?
.The purpose of the research had a more important meaning for them than ______.
Believe it or not, he came _______.