2．
A. Seldom do people think about the real dangers of this (1) , both from eating disorders and from having (2) .
B. Well, there are lots of examples of societies in which people have done some (3) . For instance, some European women used to have their bottom ribs removed so that they would (4) .
C. People who are not fit but want to lose weight should keep their pulse rate low and (5) for a longer time. People who are quite fit can do exercises that require large amounts of energy. They can even (6) .
D. Most people do it every day! It is (7) and is recommended for beginners.
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