【单选题】

Responsibilities—We all have them; most of us have more than we’d like. That doesn’t change the reality that, sooner or later, we all have to (1) up to them.But perhaps it does explain our (2) to add to the ever-growing list. There’s already so much to ’do in a day, why tack on an (3) burden

Unfortunately, it’s this kind of defeatist mentality (4) keeps people from enhancing their lives through proper (5) and exercise. Here is the salient point, though: The health and fitness benefits you’ll derive from (6) the necessary work are worth whatever sacrifices you must make (7) the way. I can’t count how many times I’ve heard the same (8) .Each time, I always give the same response: Yes, I say, working out is work. So is taking the (9) to eat right. (10) yourself on the couch or having drinks with friends after work is a lot easier than exercising, and hitting the McDonald’s drive-thru takes a lot less time than cooking a (11) at home.But channel surfing, margaritas and a Quarter Pounder WithCheese aren’t going to produce some of the things worth having—a low cholesterol level or the (12) to go shirtless on the beach. Those benefits demand a (13) effort. I’m not saying you should eschew the (14) night on the town or gourmet meal at a five-star restaurant.Both have their (15) and are components of a well-rounded life. I’ve enjoyed my (16) of revelry and fine (17) and look forward to those special opportunities to experience more of the good life.But I’ve managed to find a balance between those (18) pleasures and a permanent (19) to a regular workout and a healthy diet.Because, (20) , it is the latter that will have a lasting improvement on the overall quality of my life.
A、alongB、byC、onD、in