As second-hand smoking is more harmful and dangerous, people want a total _____against smoking in public．

  In this experiment, the famous professor showed three different ________ to the study of physics.(2012·河北保定中学月考)

In the program “You Are The One” last week, everybody had the ______ that she was a good match for the young man. 

----What do you know the _____ of are the pig influenza in humans? ---- usually similar to regular human seasonal influenza .

According to the recent research, heavy coffee drinking and heart attack is not necessarily      and effect