1 . My anxiety drove me to try every _______ (mean) possible to lose weight, including dieting and weight-loss pills, but this brought me nothing but pain and poor health.(所给词的适当形式填空)

2 . Researchers at the University of California found that_________ (expose) to the cold increases levels of a protein _________helps form brown fat — the type of fat that produces heat and keeps us warm. （所给词的适当形式填空）