1 . About one year ago, 24­year­old Alex Wong found himself struggling with his mental health. With ________(anxious), he couldn’t fall asleep, especially at night. (所给词的适当形式填空)

2 . Recent studies show physical activity can improve brain function as well as calming the mind and body, at a time when ________ (anxious) among teenagers is at record levels. (所给词的适当形式填空）

3 . People who think positively demonstrate increased life spans(寿命), lower rates of depression and ______(anxious), better physical and psychological health, reduced risks of death from heart problems. (所给词的适当形式填空)