---Della, would you like some potato chips? ---No potato chips for me---I’m ______ a diet.
I regret ______ those weight-loss pills, because I am now in hospital.
Walking and riding your bike count, and ______ .
Healthy eating along with regular exercise _______ important for your health.
Experts suggest that teenagers _____ at least 30 minutes exercising, five times a week.
As ______ matter of fact, Mr. Wang is in _____charge of this special school at present.