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 (1)_____ maintaining a consistent weight. You need to figure out how many calories you need in a day and how many you actually (2)______. The next step is to add exercise (3)_____ you can raise the number of calories you can consume per day.
Burning 250 or 500 calories per day can make a big (4)_____ . You can ride an exercise bike while you are watching television (5)______ 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.
Điền vào số 1
A. for
B. with
C. at
D. to
Đáp án D
Giải thích: The key to + N/Ving = chìa khóa/yếu tổ quyết định đối với cái gì/việc gì