48. They were all tired, but _____ of them would stop to take a rest.
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.
She never tells a lie, ______ ? A doesn’t she B. didn’t she C. does she D. did she