Write the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions

Part 6. Write the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

     Doing exercise is very essential for every human being.We know we should do it, but something always seems to keep us from getting started. In America, more than 65 percent of the population gets little or no exercise, even though they have been reminded time and again of the wonderful effects of regular physical activity on body and mind.

       Americans  constantly go on diets, yet in the last three decades they have become fatter and fatter, despite the fact that they actually consume fewer calories than in the past. Since body fat cannot appear out of thin air, the explanation for their increasing weight must be that they are using up a lot fewer calories than they are consuming. It isn’t difficult to figure out why this is so. All they have to do is look around at their lives. They are surrounded by machines and gadgets that make moving unnecessary:remote control TVs,  elevators and escalators, washing machines and dishwashers, computer and fax machines, email at home and in the office. They hardly have to lift a finger to get through the day. And, to be sure, most of them don't.

      According to an exercise expert, if people spend two minutes an hour of each workday sending email to office mates instead of walking down hall to talk to them, they will eventually accumulate the caloric equivalent to 11 pounds of body fat in a decade.

26. Which best serves as the title of the passage?

   A. Benefits of Exercising                                   B. Why Americans Are Lazy

   C. Americans’ Overweight                                   D. Americans’ Laziness of Exercising

27. Which of the following is NOT mentioned as machines that make moving unnecessary?

   A. elevators                    B. dishwashers              C. computers                 D. televisions

28. The word "gadgets” in paragraph 2 is closest in meaning to _______?

   A. networks                    B. devices     C. facilities                                    D. designs

29. According to the passage, people put on weight because ________.

   A. they use fewer calories than consuming.  B.their body cannot appear in the air

   C. they don’t move gadgets                                  D. they consume more calories than needed

30. The word "they" in paragraph 2 refers to _________?

   A. diets                           B. decades                     C. Americans                 D. calories