一、补全填空
1、联系上下文，根据首字母填写单词。
Every flu season it seems like we’re bombarded (炮轰, 轰击) with commercials for new and improved medicines promising to relieve terrible headaches and f___1___. But for many people around the world, the secret to avoiding a nasty or even fatal cold might lie in a better diet, not drugs. Researchers from the University of North Carolina at Chapel Hill, the Beltsville Human Nutrition Research Center in Maryland, and the Nestle Research Center in Switzerland have found that a deficiency of the mineral selenium (硒) may c___2___ to the spread of highly virulent strains of influenza virus.
