(21) ..............A. for B. with C. at D. to

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks

Unfortunately, diets don‘t work for most people. They do lose weight but then go off the diet and put it back. Building a sensible diet and exercise plan is the key (21)_____ maintaining a consistent weight. You need to figure out how many calories you need in a day and how many you actually (22)______. The next step is to add exercise (23)_____ you can raise the number of calories you can consume per day.

Burning 250 or 500 calories per day can make a big (24)_____ . You can ride an exercise bike while you are watching television (25)______ you can take the stairs instead of the elevator. Find an exercise partner. Exercises can be a lot easier if there is someone to talk to. It‘s a good idea to wear firm-fitting clothes if you are on a diet. Tight clothing acts as a reminder of what you are trying to accomplish.

(21) ..............

• A. for
• B. with
• C. at
• D. to