Taking drugs has become part of every sport _________ athletes seek to achieve beyond their natural limits.
—Sorry , but I can’t visit you tomorrow . —Come whenever it is to your .
—What did you do last night ? —a composition , I finished my physics homework .
An interesting suggestion on how to measure the temperature on the moon has been .
As we all know , bad eating habits and a of exercise may lead to health problems .
—John, what about going for a bicycle ride tomorrow? —______. I am looking forward to it.